Your mobile AT&T data plan is not the only thing that is capped. AT&T also caps your home broadband connection at 150 GB. If you go over, you pay overage of $10 per additional 50 GB, which isn't too bad, I suppose.
I was looking for an option for my cable Internet connection today, even if it is a bit slower. I was a bit surprised to find that U-Verse can match my cable internet connection speed, and even surpass it a bit.
Fortunately, they don't throttle your connection speed, as far as I can tell. My household might go over 150 GB/month; I'm not certain. We use Netflix quite a bit; 5 GB per day seems like it might just cover our needs.
What I found interesting is that the 150 GB cap applies to whatever plan you choose, whether it be the low-end plan or the top notch plan. I think this is odd as a faster connection would most likely reach the limit sooner than a slower connection. I would have expected that along with a higher speed, additional data would be included.
I'll have to think about it. AT&T is only slightly less expensive than cable. I would have to check with my current Internet service provider to see if they have limits on downloaded data.