The KWC is so far the only M&P airsoft I've seen.
BigChessie, the appeal varies on the person. Kids like them because they're gun-like and their parent will buy them, because they're safe, you know. Not like the olden days with one-pump BB-guns.
You can do low/no-light practice in your home. Set up some targets consisting of several sheets thick of cardboard and clear the rooms.
The best thing to do with them is get with the buddies, go out into the yard/woods, and have wars. My friends and I had a small three-way battle on July 4th last year. We only had spring powered ones, but the moving and shooting was a lot of fun. Using trees (and the garden) for cover. My friend had his battery powered AK and I had a pump shotgun. He had half the range I did and I was sniping him through the branches of a tree. Then when the long guns ran dry, I pulled my 1911 from my Blackhawk drop-leg holster and moved in, shooting on the move.
The simplicity of my success was that I was a IDPA/USPSA local match attender and my friends have almost no firearms training, let alone tactics or experience on the move. It was kinda sad, actually.
Regardless, it's fun.