I have TWC 300down/50up, no issues here. Maybe it's because of my city.

The only issues I have are getting DDoSed, which I can easily change my IP (dynamic) through TWC with certain modem settings.

The only real issues with TWC are their ubee modems (outdated). TWC does not allow configuration access to them and you must find the password yourself (r3m3mb3rm31) or something like that. If you have a ubee modem still, visit a center and upgrade it for free. Equipment upgrades are free unless it requires a subscribe ion upgrade (rarely the case) to utilize.