Been using them for a while.
Best results ever. I've gone other places to save a couple of bucks and what a nightmare.
Davidson's is a no brainer. And- EVERYTHING you buy from them comes with a lifetime defect repair or replace policy- FREE. They will replace you gun with one of your choice, don't have to be the same one, or repair it.
I've called them on stock checks and stuff and they are simply wonderful to deal with. They have a GIANT wharehouse next to the FedEx building at PHX Itl airport so all their stuff goes right out that day. The longest it's taken to get to my FFL is two days.
I also think they sell more firearms than anyone in the States, maybe the world.
I sound like a commercial, geez...