I've only ever used CloudFlare, the free package, and self-configured (not through cPanel, as I use my own name servers due to having it all preconfigured prior to hosting through x10Hosting).
Their customer support is quite frankly excellent, I've had multiple messages going back and forth within minutes when trying to sort things out, the latest being needing assistance adding a custom record to my domain to do with spam control.
Not looked elsewhere because I've been perfectly happy with CF.
HTH.
N.B.: I've just proof-read this and want to clarify that I DO NOT represent CoudFlare in any other way than being a happy customer.