The new model is great, and you should get one if that's what you want (I suggest avoiding the old model). As mentioned by others, stick with factory mags - all others just cause frustration. I have heard that the Tapco mags work well for some, but my experience was that they were too big for the mag well. I suppose you could trim those down if you had too, but again just stick with factory mags.
...And it cannot be configured a million ways to suite the owner's personal tastes like an AR.