I use this power tool every day. It has never let me down. (with all the attachments they make today for drills this is a very versatile tool)
As for a hand tool you be surprised how much you can do w/this working on an a/c / furnace unit.)
I realize that this will vary from person to person and what field they work in. Since the home remodel buisness has tanked here in Cali I have gone into home repair.