I was able to get longer time period on Rithmic. Granted, Kinetick is a purer data but for my purposes it's good.
Brokers have data. IB has data, their service is not good for history in chunks less than thirty seconds but in realtime I guess it's ok. In case of a data outage "disaster" just failover to your broker's feed for quotes... Some charting services will allow two data feeds at the same time so the failover would be automatic, I think that Multicharts does that, not sure if others do that, it would be good to know which ones do that actually...
I haven't used KT but these seem like minor issues. How often do you need to get in touch with customer service? The important things are a data feed that works reliably (even when stressed, fast markets etc), low prices, and access to historical data. If KT offers these then it would be a fine option for someone just starting out, or who is concerned with keeping costs as low as possible.