For a size comparison if folks haven't seen it - here are 3 mounted and aired up tires. 285/70/17 AT2s worn on left, 285/75/17 Cooper AT3 middle, and 275/60/20 Cooper HT on the right (my street tire set). Cooper 285/75's are narrower and quite a bit taller than the other two. The 275's are oddly the widest of the bunch. Just a reference point though for folks who might be curious on the size difference between them in real life.
I've been pretty happy with the AT3's as an all around tire. Good highway manners. Durable in the dirt. And pretty good all around dirt traction (definitely not a good mud tire, but good for most other terrain).