Well, I wouldn't say it's a 1911 clone, that's for sure.
While the grip may replicate the angle of a 1911 grip, the Ruger has always been notorious for little idiosyncrasies like having the mag release on the bottom of the handle and having more of a button slide release instead of a more traditional lever.
The Mark III also doesn't have the same type of trigger as a 1911. It has more of a traditional pistol "rocker style" trigger, where on the 1911 it's more of linear travel, so how much 1911 style training are you really looking for?
The price isn't bad, and I had a Ruger pistol for years when I was a kid that never missed a beat, but if you are looking for cheap 1911 style training, I would recommend against it honestly.
Any 1911 can get a conversion barrel & slide, along with a mag, to shoot .22 cal - which would be much better if simulation training is what you are truly after...