Feature:
Tons of inputs & outputs with affected & unaffected options. Effect loop with the ability to run in series or parallel (50/50 mix of your effects loop device blended with your clean (or distorted RBI tone) - great for blending some of your original tone with your favorite effects pedals so the bottom end does get lost.

Quality:
Hand made units in the USA - does it get any better? Built like tanks.

Value:
Ampeg SVT & Bassman tones at this price? You gotta be kidding me - definitely a 10!

Sound:
Ampeg SVT tone is nailed - I've heard several A/B comparison clips on the internet against the real deal (Ampeg SVT), with an open poll to vote on which is the "real" SVT and which is the SansAmp. I've been playing for 25 years, and I could not tell, nor could 80% or more of the voters on a bass enthusiast website. I have a hunch some of those that guessed correct - "guessed" correct - know what I mean? I love the meaty, grindy tones & more than you can get with this unit. I also pair mine up with a SansAmp RPM through a Schroeder 21012L cabinet. 90% of the grind however is the RBI itself. Killer tone. There is always someone trying to telling you why their $10,000 dollar bass rig sounds 5% better than your $300.00 SansAmp. The difference is almost non-perceptible & totally non-perceptible to non-musicians enjoying your music. The SansAmp rocks! HIGHLY RECOMMENDED.

Ease of Use:
Simple to operate - use the Blend knob to bring in the right amount of OD/Distortion then rock out!

Support:
I've owned my SansAmp(s) for several years never had to call - product is reliable & rock solid. Probably will never break down.

Overall:
Simply the best.

Feature:
This thing is loaded with knobs that can help bend form and shape your perfect tone.

Quality:
I saw the guy drop this in his rack case before the show, i dont know if it was the rack case or the actual item, but it still sounded amazing

Value:
If i had the money, id buy 7, one for each day of the week.

Desirability:
This thing is as beautiful as it sounds.

Sound:
The sound of this product, is by far the most amazing sound ive ever heard come out of an amp. I used it with an Ampeg Svt3 Pro, and an Ampeg 8x10 Cab. The tone was the fattest, roundest, punchest tone, ive ever heard.