I had the rv500 and sold it quite quickly. Plastic sounds. A toy with tons of parameters and not a single decent preset, boss expecting users to find one. Got an h9, different worlds. Kept the great Neunaber and for ambient the bigsky. An hardwire rv7 which i keep spare is ditching an rv500 twice on SundaysBoss RV-500. Fantastic plate and hall algorithms. It also should immediately get “Best-in-Class” award, for a pedal-based reverb, due to fact you can put reverb in parallel (with a built-in digital delay, or another reverb) AND you can assign full effect ducking parameters to either reverbs/delays. It is the only reverb in pedal-format, to my knowledge, that has these capabilities. Also, there is the 32-bit/ 96Khz processing and A/D D/A converters.