Sound — 8
The sounds can vary greatly with the settings on it. When I was first setting it up for my sound I found that when you run a bass through it you should have the tone knob down all the way to reduce the sound of your fingers sliding across the strings (it sounds nasty). It sounds good with a guitar, but with a bass you a lot of your bottom end. The "level" knob is very sensitive, when you have it too high and you Switch from clean to overdriven, the overdriven is considerably louder the the clean.
Overall Impression — 9
I played a lot of heavier stuff, ex: Avenged Sevenfold, Iron Maiden, Megadeth, Metallica, and I find that it fits perfect for all of it (even if I loose a lot of bottom end) If it was stolen and I actually had money to buy another I would probably buy the bass version of this. I love the knob to control how overdriven you want your sounds, but I don't like how sensitive the "level" knob is or the sound you create when you run your fingers across it with the tone knob above "0." I wish Boss made one pedal that had a guitar or bass.
Reliability & Durability — 10
I've kicked this pedal around a lot and I've found no problems with it. I wouldn't use this one on a gig because I'm using it for the wrong instrument, but if I played guitar I would use it without a back up. The battery life is very long, I've used one battery for about 2 months and I don't hear any changes from when I first put in the battery.
Ease of Use — 10
I got this pedal from a friend for my birthday, even though its for guitar I use it for bass. This pedal is very easy to set up and adjust for you preferred overdriven sound. The sounds can vary greatly with the settings on it. When I was first setting it up for my sound I found that when you run a bass through it you should have the tone knob down all the way to reduce the sound of your fingers sliding across the strings (it sounds nasty).