Feature:
The number of effects are great. Especially when you consider the sheer number of patches that can be used. 40 factory plus 40 user with 47 effects types! $99 bucks is amazing for what you get.

Quality:
This is a great pedal with all metal construction. Very tough and should definitely outlast other multieffcts which are all plastic.

Value:
You get a truly amzing and versatile product for what it costs.

Desirability:
Come on. It's a pedal. Most folks will never realize it is there. However, the green is cool and the chrome is sharp. It looks great for what it is.

Sound:
Pedal sounds great. The effects are all good and believeable. THe best thing is that everything is totally adjustable. The only drawbacks are the way the modules are setup. You can only use one effect from each module, so some effect that you'd like to mix can't be done. Also, reverb can't be used when using the drum machine. The drum machine sounds great by the way and is a lot of fun.

Ease of Use:
Very easy to use. The disply is small but very understandable. Just select the module and start turning the knobs til you're happy with the sound.

Support:
Haven't used it, but the instructions are great

Overall:
This is a product that you should enjoy forever. It is infinitely variable. Don't buy a new guitar til you try this. You will be amazed. AND SAVE $$$$$$$$$$$$$$$$$$$$$$$$$$$

Feature:
While the unit can be battery-operated (4-AA cells), an AC power supply is included with it. The best features are the modFX and delays. It also includes an on/off switch. What it lacks, IMO, is a good stereo output. Instead of using two 1/4" TS jacks for separate L/R signals, this uses a single 1/4" TRS output jack. I also wish the unit had put the reverse delay and tape echo functions in the delay/reverb cluster of FX. Instead, Zoom put them with the modulation FX (chorus/phaser/flanger/tremolo) so one cannot use phaser or flanger with reverse delay--so much for my using this for a rendition of "Rain"

Quality:
This is very solidly built. The four adjustment knobs are sturdy, not loose. The two footswitches are solid on/off types like you would find on an old-fashioned stomp box--not lightweight solenoid type switches. While I have not owned this long enough to tell how it will work in the long run, several friends have been using the Zoom 505 and 504 boxes for over 6 years now with little sign of wear. If this lasts half that long it will be worth it.

Value:
Even though this has a ton of features I'll probably never need or use, it is worth the price for the features I will be using. It has the most features compared with any other product in its price range, or even double it's price.

Desirability:
While this is definitely a great piece of equipment and I don't regret this purchase, I could not give this a 10 simply because of what it lacks in features. Yes, if I had to do it over again, I'd still pick this unit; but if it had dual 1/4" outputs and reverse delay in the proper FX cluster with the other delay FX, this would rank a solid 10 with me.

Sound:
While this offers modeling choices for 11 different acoustic guitar models, I've found this excels at bringing out the best in the acoustic-electric plugged into it. While it comes with a noise reduction feature built in, I have found it to be virtually noiseless without even turning the noise reduction on. The 6-band EQ option really helps to scoop out the midrange to eliminate piezo "quack."

Ease of Use:
This is very easy to use. The interface is not completely intuitive, but the instruction manual is clearly written and five minuts spent reading it is sufficient. I was able to edit and store 20 user-edited patches in less than an hour. And about 10 minutes of that hour was spent in tweaking the EQ to get it to sound the way I wanted. After that it was a snap.

Support:
I'd have to say I have no experience with their customer service but I've never had a problem where I've had to deal with them.

Overall:
I really don't anticipate buying another FX box for a long time. I will make do with this one since it still does a lot of things that I need. If it were lost or stolen I would definitely replace it with another A2.

Feature:
Have been using for about a week and it's much more than just plug and play. Seems to be fairly intuitive once you get used to it - you may want to keep the manual around to see what all those parameters actually are (or memorize about 300 of them).

Quality:
Seems to be well made, I haven't dropped it down the steps yet.

Value:
Seems to be a lot of bang for the buck. Chorus, echo, flanger, phase shifter, etc all under on roof. Add 'em up people.

Desirability:
Uh, it's a foot pedal. It is a REALLY nice color green though.

Sound:
Guitar modeling is good, subtle (read as "not cheesy". Fool with the buttons and you can get just about anything you want - multi-function buttons allow you to set the parameters for everything with 3 knobs.

Ease of Use:
Not for the faint of heart. Display is a 2 digit code so you really have to know where things are stored. Keep a list handy. This is the only real drawback but i'm getting used to it.

Support:
Haven't needed it.

Overall:
I'm so glad I bought this. I sound better already and that's what it's all about. I'm sure there are better effects out there but for the price I don't see how you can beat this one.

Feature:
Lots of features. Lots of effects. Parameter adjustment was straight-forward and did what I expected them to do.

Quality:
The unit feels heavy and sturdy. No complains about the build quality.

Sound:
After reading so many positive reviews, I decided to purchase this unit for my acoustic duo. Unfortunately I was really disappointed with the boxy digital sound.

Support:
N/A

Overall:
At the end of the day, despite its ease of use, despite the sturdy design, the sound quality was under par. It lasted for 2 gigs, both times I disconnected it after the 1st set, and chose to use the effects on the Yamaha mixer instead, which frankly were much better. The reverb and compression are very digital sounding; it's boxy - no transparency at all despite my best efforts to tweak the parameters. I really wanted to like this product. Unfortunately it's packed away in a box and regarded as a wasted purchase. I'm never buying a unit based on user reviews again!