What we have experienced thru their customer support is without any doubt the best from any telco provider I have ever met. Even better than B2B with 24/7 support contracts (and I have dealt with quite a few operators in several countries).
Unexpectedly quick handling of issues, at their expense (even that the fault laid on a supplier of them). Friendly, helpful and kind staff, who obviously care and do what needs to be done, and follows up to inform and confirm that issues have been resolved.

Keep up the good work guys.
(If there is any way for me to give you a kudos your managers would see, please tell, and I'd happily do so).