I can't say I'm familiar with the box he has but we're a Charter customer and we don't have any issues at all. We've got a 65" plasma and the feed is really good. On the internet side of things, it took us at least a couple years to get the bugs worked out of Charter's wiring but they finally came through.
We are what most would consider rural. We are literally, the last house on the cable run. For about two years, we'd regularly call for dropped internet. They'd send a guy out, I'd prove to him packet loss and latency issues, he'd 'fix' something, it would work for a while and then we'd have the same issues again. Repeat process, over and over, until earlier this year. I turned my wife loose on them (Hell hath no fury...). They finally sent a guy that actually knew what he was doing and he got it fixed.
Bottom line, other than the ridiculous price they charge for their service, we're pretty happy their quality. We live on streaming video and when we do watch cable, the feeds are quality.
I'm surprised that you only have 10 HD channels. We've got to have 50 or 60, not including premium movie channels that we don't subscribe to.