I had a PRP that I really enjoyed until she was stolen. But I replaced her with a S/S coupled full size bike which I have to say for me performs better and I enjoy even more. I found the PRP too flexy without a top tube for stability. If folding isn't important and you are mechanically inclined, I think S/S coupled bikes are a great way to go. I got a really good deal on a steel frame on ebay, and sent it to Bilenky in PA to have the couplers installed and a custom fork built.