I use a vanguard holster.. carry it everyday 8+ hr days.. comfortable enough for me, and very low profile.. quick to put on and off and secure (not a hassle in retrospective).
http://www.ravenconcealment.com/holsters/vanguard-holster-systems
I carry one of these all day every day unless I am carrying my M&P pro.
on one of these.
But I am biased.