Feature:
Features include Low, Mid, and High EQ as well as the color button mentioned above. The distortion seems to be pretty versatile in that you have a volume, blend, trigger (for the noise gate), and gain control. The blend allows you to blend the clean channel with the distorted channel. The unit also features XLR out along with a parallel out to run direct to the PA and to your amp.

Quality:
HEAVY DUTY. Metal Casing everything seems pretty solid. The battery compartment may be the only thing that might break. It's made out of plastic. It still seems fine though.

Value:
This unit sells for around $135 bucks. That seems a bit pricey, but it's cheaper than the Sansamp unit. I think the real value of this unit is being able to walk into practice or a gig with just the M-80 and know that you will be able to get a good sound without having to break your back carrying an amp.

Desirability:
This thing looks cool to me. I would say that I bought it more for the practicality than the looks though. A unit like this is a good investment for any bass player to use direct to the PA or just to beef up the sound of your amp. Even if you don't use it all the time, it would be good to have as a back up in case you get an annoying hum in your amp from neon beer signs or some jack ass wants to play on Mustang Sally and blows out your amp.

Sound:
The sound of this box sounds old school to me. That's a good thing. It really adds a lot of punch to my amp. I have been able to get the big warm round sound (with passive pickups) going direct through the PA and I've been able to get a nice punchy growling sound (active pickups) going into my Ampeg BA 115. I compared it to the Tech 21 RBI and I have to say I like the MXR M-80 better, especially when going to direct to the PA. The Tech 21 seemed to lack something when going into the PA. I will say the MXR definitely needs a compressor to tighten up the sound a bit. This unit has a distortion channel that sounds pretty good. You can get a slightly overdriven distortion or you can get really nasty, whatever you desire. I will say that the Tech 21 wins in this area though. The unit has a color button that gives a subtle, but noticeable boost to the mid-range frequencies. This is very useful to cut through the mix when playing live.

Support:
I have not had to contact them. I've had the unit for about 6 months now.

Overall:
Overall, I am happy with the M-80. I could honestly say I would recommend it to other bass players. Everyone has their own individual tastes though. Most of the online retailers offer a pretty good return policy if you don't. Try it, you'll like it.

Feature:
All it needs is compression.

Quality:
Built very well. When you pick it up, you know you got something good.

Value:
100 bucks cheaper than the Sansamp. And better! ( I've had one ).

Desirability:
Its a good piece of gear that has become an essential part of my rig.

Sound:
Sounds great. No noise whatsoever. Great EQ, not complicated at all. Distortion from just a little grind to over the top, and everywhere in between.

Ease of Use:
Very simple. I plugged my Rickenbacker 4004 in, and within 10 or 15 minutes I had it mastered.

Support:
I went middle of the road here, just because I havent had to contact the company yet.

Overall:
For me its tops right now.