Haven't installed one yet, but planning on a Solatube for a small guest bath. A friend nearby had one installed a year or so ago and he and his wife are thrilled. Looks beautiful. I'm going to DIM, of course, but the dealer in Tampa has been very helpful. We're now waiting for my checkbook to refill.
I want the roof light-gatherer to be on the east side, and the bathroom is on the west side, so it'll be a longish run of the light pipe. Going to combine it with their vent fan as well, I think.