I've had one for 13 years I started out with a PR and upgraded that then I bought a new used PRS standard that I still have. I also have a PRT that I bought for parts I needed a new control board as lighting took mine out and there was a piece meal PRT with a good controller that I picked up to get me by until my parts came in. I am thinking of going with the Acorn controller now as I see that it is supposed to be more robust and no com errors. According to Centroid I have all the parts other then their Acorn control board Gary Campbell showed how smooth and fast it should run.