Pros: Over Ear, Little Clamp, Quality for the price
Cons: Little Clamp (For some oddballs :P), Pleathery pads, Wing system
I do not have a large head, nor an obscure shaped one. What I can tell you is that they are by far the best sounding headphone you will get at $99.
They are genre plastic, and do well with many types of genres.
They can be sibilant under poorly recorded / low quality music files using Asian DACs/DAPs. Under DAPs such as the Zune HD, and the Nokia 808, sibilance is not as common. This is only a minor gripe, as they have never been sibilant to the point where they fatigue.
Comfort can be a mixed bag for some, my only issue with comfort was giving the pads time to break in.
The Wing System is notorious in the Head-Fi community. Most people find them comfortable to wear, however some find the supports to be unreliable. Overall I have not had any issue with the AT line, though I do prefer more clamp than what they offer.
If you're looking for a headphone for the home for cheap, this is an easy recommendation. They do isolate and have good leakage, however, wearing these in public will get you a few good stares (yes, this is coming from personal experience)
I haven't gone in detail intentionally, as there isn't anything in this price range worth looking at when you can get the A900x for $99 refurbished.