My experience from a service aspect has been good so far and our mod super seems to like dealing with them as well. Now granted the first one we installed was only 5 years ago.

So far we have done about 20 hydros, and a half dozen tractions which range from 100fpm to 800fpm on the tractions. The only issue I've had so far is a bad soft start on a hydro which really isn't a reflection on smart rise.

All things considered I'd certainly recommend them.