I used my brother in laws professional sprayer in my previous houses basement remodel. You are right, all the work is in the prep as the spraying is very fast. I do like the look of sprayed trim a lot. The downsides are you will use a LOT more paint than rolling. Also rolling helps bind the paint to the wall a bit better. It will resist chipping a bit more. Also spraying the walls will reveal any drywall/mudding imperfections more than rolling since it leaves a smooth finish. I have read contractors sometimes spray the walls then roll them while its still wet. But I've also read how thats a ton of wasted work.

Overall it's nearly a 50/50 decision for me... after spraying our last project I opted to just roll everything this time. I kinda wish I would have spent the time to prep everything to spray our doors and trim this time but I would still just roll the walls.

-Ben
HT v2.0
HT v1.0