The TV system is very poor, or at least was when we were there in September. The local stations are the lowest on the dial, all of them appear between 2 and 13. When we were there the lowest 21 stations didn't come in at all and above that the picture was sticky and stuttered. This was reported by others as well, and we also observed it in the laundry room. A friend in Orlando whos wife works at Disney said that they were having issues, most likely with another company that installed the system.
It's not a normal cable distribution system, instead each TV has a modem and as you change channels you're actually telling the modem to get a different stream. Obviously they haven't perfected it.
We called the first day and they fixed it the next day, although due to the compression they use for the streaming channels the HD stations were a little soft, kinda like watching Netflix, not real HD TV. But hey, we're in Hawaii on vacation, so we didn't care much.