I had an EP3 Echoplex and yes they are good however they require maintenance and are very expensive. They can be inconsistent when moved around, so, if your plan is to bring it home and leave it in the corner you will be ok.
I think they are great but I came to the conclusion other units sound very close and are a fraction of the cost. I decided to sell my EP3...............There are many other options that sound great (Wampler, Strymon, Catlinbread) Just name a few!
Just my $.02