They only schedule two slots per day so the techs can insure everything goes smoothly. My installation was done in 30 minutes, but it took another 1.5 hours to cut over my Verizon phone to TWC.
Before the installation, they went through an exhaustive list of questions to make sure the tech would be prepared (do you want to use your own wireless, do you have Ipads, Iphones etc)
They replaced my splitter with a new one, and they recrimped all the cables with a new connector. They certainly don't cut any corners.
Had some issues with my Cisco 8642HDC (kept my box) and Samsung H3272 (new) box. The channels wouldn't change properly from time to time. After to days and several reboots later, the problem disappeared. I also had some issues setting up the recording series on the Samsung box. Again, after two code "pushes" and reboots later, things are working as expected.
The caller ID on the TV is convenient and the LookBack service is handy to have.
There's no real difference in picture quality nor sound - I didn't expect there would be.
The Whole house DVR is convenient, and the recordings show up as one logical list. You can't readily tell which DVR the show is on - not that it really matters. FYI, you cannot delete a show that was recorded on the other DVR.
There's no issue with phone service either. The TA has room to accommodate another analog phone line if you need two phone lines.
The Voice service has the ability to setup distinctive ring service based on phone number and the self-service portal is simple enough to use.
I never had any premium movie channels before, but I opted to pay the additional $20 to get HBO, Showtime, TMC and Cinemax.
I already had the wideband service and the speed was about the same (50Mbps download/5Mbps upload).
All in all, quite happy. I did notice one oddity however. Before if I was recording two shows, I could watch one of the shows. Obviously, you can't change the channel since both tuners are busy. But you could watch it. Now, the screen goes blank. I'll have to see if it was a one time thing or if it's some bug.
So if you're on the fence, I would recommend the signature service. When you factor in the savings by cancelling my verizon POTS line, it's really a no brainer.