Sound — 8
I have the BD-2 in my chain after my CS-2 compressor, before my MT-2 metal zone and Electro Harmonix Holy Grail and lastly a BBE Sonic Stomp before hitting my Crate 2x12 combo. I kick on the BD-2 for increase sustain and harmonics and to fill out the treble of my MT-2. The BD-2 works great in this fasion but doesn't provide enough balls to stand alone in my opinion. It does add dimension but is to gritty and weak sounding for my ears as a stand alone.
Overall Impression — 9
Yeah I play metal. Yeah it's a Blues driver. Yeah I like the tone shaping it provides and also the creamy sustain it can add to my MT-2. I've been playing 10 years and have tried p-edals from Danelectro to line -6 and DigiTech. The blues driver is among the best, to my ear, at helping push your tone past those low sustain thresholds without adding too much gain. Try using it like me as a boost not a stand alone distortion box and it will provide years of service.
Reliability & Durability — 10
Boss quality and dependability. I bought it used(and it looks well used)and everything about the pedal is great except the limited gain. Definitely use to Drive your amp distortion or another box cause the sound is dry on it's own. Has a secure place in my rig as a volume boost or to control some of the feedback(yeah, the output of my amp gets lowered when I step on itbecause that is the way I use it with the level low on the BD-2 / compressor and high on the MT-2. very reliable pedal.
Ease of Use — 10
The BD-2 has only 3 knobs(level, tone and Drive) so it can't get easier to use. It has a standard 1/4 in. input/output(no stereo) and can be run off 9volt battery or DCplug. I didn't get a manual since I bought it used for $20!! you can't beat that price for Boss quality effects. Blues Driver fits into anyones rig and can be used stand alone or run into another distortion box(like I do) for more saturated tones.