I've been on UVerse since September, and this past week was the first time I've noticed any stuttering or pixellation. I understand that infrastructure upgrades are underway (to deliver three simultaneous HD streams). Maybe this is a part of the problem.
These IPTV boxes are quite a bit lower in complexity and build quality compared to the ones BHN deploys, but I'd imagine they cost a lot less, too. Hopefully they will be hardened and add features as time goes on. We've had two issues with the boxes. On the bedroom TV, we had spotty remote control usage no more than 10-20' from the TV. Turned out being the "warm" temperature setting for the picture interferes with IR reception on the box. I'm looking for a wall mounted double shelf to put under the TV & "mask" the IR sensor on the IPTV box from direct exposure to the light from the TV, and then see if I can turn my "heat" back up. In the living room, we had the box mounted in the TV stand, directly under the projector portion of our DLP TV. It suffered from chronic "freezes," requiring a power cycle to clear, usually at start up time. We tried everything. After the issue in the bedroom, I moved the box to a position underneath the home theater receiver and the problem hasn't returned. I guess the receiver makes a good enough shield. I'm told it might be something emanating from the color wheel component.
Anyhow, I was impressed with one thing that happened during troubleshooting. We had to swap the dvr box, and of course we lost all the recordings. But, with the home dvr system, a copy of your program settings resides on the home gateway. So I didn't have to reprogram all my recordings. There are some features I miss from the BH boxes, but this one UVerse has is pretty cool - and a timesaver.
The biggest problem with the IPTV boxes is this: Windows CE is their operating system. So, what they lose in hardware cost for the simpler box, they gain in licensing fees and instability, lol. Hopefully, since Cisco produces both STB's (BHN & ATT), we'll see some features make their way over. And you'd think they'd try to put in on Linux, considering the cost differences. But, I'm just speculating. For now, there's too much to like about UVerse to worry about a few features.