It's no joke! I haven't heard many clips of people using it but it's all I use for clean sounds at the moment.
I use the ML Double Verb SM57-MD421 4 IR for just about all of my clean sounds. In this clip I'm also using the Double Verb amp sim and a Fender Stratocaster. Large Spring reverb in there also.
Just amazing how realistic it sounds.
How many of you have tried it?