Real owners rate these about evenly: 64% of 167 Boss BD-2 Blues Driver owners recommend it, vs 60% of 15 for the Holy Grail Nano Reverb.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
“the Blues Driver beat all of them. The most organic drive I've heard in a pedal.”— @jonny1251 on YouTube
“LOVED my bd-2 and ds-1 when i was in high school”— @jonwanrocks on YouTube
“Mehhh. I have the Waza version, and I can hear the same fizziness - which some may like but I don't.”— @RPSartre01 on YouTube
“I have the nano but same... Spring always on. It was my first pedal and I don't think I've ever turned it off!”— dnlprn86 on Reddit
“Great simple reverb. If you’re looking for huge trails, etc. it’s not what you’re after but if you want an easy set and forget, solid sounding reverb it’s still hard to beat, especially for the used price.”— Palomar_Sound on Reddit
“good but quite plain isn't it and there are so many other pedals that cover this sound entirely plus more, dunno why someone would get this where there's so much better available.”— Thereminz on Reddit
Real owners rate these about evenly: 64% of 167 Boss BD-2 Blues Driver owners recommend it, vs 60% of 15 for the Holy Grail Nano Reverb.
Owners point the Boss BD-2 Blues Driver at blues and rock players wanting a versatile always-on drive, and guitarists who clean up with their volume knob.
Owners point the Holy Grail Nano Reverb at players who want one reverb parked on the board and never touched again, and small combo amps with no reverb tank of their own.
The most-cited downside of the Boss BD-2 Blues Driver is produces an audible crackle or fizz on the decay when the gain is set low. For the Holy Grail Nano Reverb, it's limited range, with none of the long trails or ambient washes some players expect from a reverb.