I have dealt with several sites and
unibet was responsive with a key issue but other sites were lax and generally unresponsive.
The one standout of late has been GG Poker.
I had an incident where I was registered then unregistered. It took a few days to sort out but then the matter was sorted and I received two emails offering profuse apologies for the inconvenience.
Just recently, I entered a tourney using a ticket and yet my cash account was debited so I emailed GG. Within an hour, they had credited my account and explained the technical hiccup and how it can occur and how to avoid it.
No other site has ever responded in that manner.
However, regarding CC and technical issues for members it should be noted the ACR representative is fantastically responsive to forum members and any issues they have- so they deserve some credit also.