have not installed any but we're going to school on them next month. From what the supply house salesman told me, they're dynamite in the right application. Over the top for most average size residential jobs.
If YOU want change, YOU have to first change.
If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!