I switched from TWC to WOW recently and I regret it. TWC was awesome in my house no slow downs and speeds were as advertised 15/1. With WOW it slows down from 7pm-12am every day. My worst speed test was at 9:30PM at 1.5/2Mb/s This all started on day one of the WOW install. I've had 3 techs come out and rewire everything from my house to the pole, and also repair the trunks on the poles in my neighborhood. They spent a whole friday doing it I saw 3 trucks and multiple employees in back yards other than mine. So far I've used 2 different cable modems, bypassed my router all together, and it is still slow at night. Their customer service is worthless for my issue. Why does everyone say they are so awesome? I never had a good phone call. I had to hang up on a few people because I seemed like they were reading a script to troubleshoot the issue. They probably were in their defense. The guys that come out to your house are nice though. The one that rewired my house needs a raise.
I got a promotion now for $20 a month 15/2 speed but I only get that on non peak hours. It is almost worth paying more to have speed at night. Right after coming home from work watching Netflix, Hulu, or Youtube 1080 is a PITA. That is when I really need a "highspeed" internet connection.
WOW sucks in my neighborhood. I would say steer clear based on my current 2 month experience.