I have never used one, but I'm sceptical.
If you are just painting your house, one room at a time, a regular roller does a fine job. Factoring in original cost, set-up and take-down time and cleaning, I don't think there would be any benefit to using a powered roller unless you are painting many rooms at one time with helper(s) to do the cutting-in, and using a large quantity of a single color of paint. (And if that was your task, a sprayer would probably work better anyway)
Please pardon the unsolicited advice, but for a quality job, it is better to spend more of your time on surface preparation (patching, sanding, priming, masking, etc) than actually applying paint. Painting is easy, but this is where many amateur jobs fail. Applying the paint should be the LEAST time-consuming part of the task.
(disclaimer: I HAVE been a professional painter)
2015 John H. Dick
1994 Larry Breslin ("Deerhead")
1952 Vincente Tatay