I purchased about 40 of these for an install. The keystones were very easy to assemble. All I needed were wire strippers and cutters. All in all, it took me about 2-3 minutes to put together each jack. The jacks sit very flush with different wall plates I purchased from other sources. I ran cable tests and everything checked out. No intermittent connection issues. For the price, this beats out other jacks I've looked at.
My only complaint is that sometimes the keystones close up while they're still in the bag, so I essentially had to open them up again. The latches are pretty fragile even when using small flat-head screwdrivers. I accidentally broke one when trying to do this. As long as I was gentle and careful, it was easy to open them up.
Does not fit with 3 or 6 holes wall plates for keystones.
Installed about 20, easy enough to install, just wanted to let people know that these will not work with monoprice wall plate for keystones that have 3 or 6 holes due to the fact that these keystones are bulky and there is not enough space between each hole. Works fine with 1,2 or 4 hole plates.