I purchased an RT-20 Rotary Ensemble back in July 2016 and have been pleased with everything about Sweetwater and the pedal.
My sales engineer, Ben Clemmer, was great to deal with and the pedal has functioned flawlessly. No, it is not a 122, 145, or 147 Leslie but I believe the RT-20 is as close as any pedal can get to sounding like an actual Leslie speaker. The adjustable rise time and overdrive make this pedal truly authentic sounding.
I would purchase it again and will buy more from Sweetwater.