I have an RP-50 which was given to me, (more liked tossed at me by a VFGP - very famous guitar player - saying it was junk) when it came out. The delay is such that it will not work for live stuff well (later models seems to have fixed that somewhat) but for the crappy way I play in my bedroom, or adding a little bit of hugely distorted guitar though a Marshall Stack, with reverb to me and my friends playing Michael Row the Boat Ashore, it seems to be good enough.