The best? That would require evaluating all the other ones and I have absolutely no need to do that. Always getting adequate answers to my questions and requests. I even got them fixing some setting on all (yes ALL) their shared servers - for the non-believers: I can prove that:-) Maybe not the cheapest but not too expensive either.
One minus though: they are rather greedy on disk space: 20GB for 'unlimited email accounts' for a 'Grow big' isn't unlimited at all and it won't grow that big, unless you set all mailboxes to 0 bytes, remember the math: 0 x unlimited = undefined...