I've had Quantum TV for a couple of weeks and i find it very unresponsive, i.e. the menu system has serious time lags before it responds to remote inputs. When I called in about it a gentleman suggested doing a modem reset which I did, but to no avail.
Also I find that quite often the search function doesn't work, i.e. when you enter your search words nonsensical or negative results appear and/or the input system freezes and you just have to exit out of search.
Thought Verizon could do better!