These guys have great support. A client of mine was using them and had a cluster get wonky. The performance of their website got really slow during an in-opportune time. MongoHQ got right on it, fixed the issue and gave them 6 months of service and doubled their instance size free or charge to make things right..... Sure it would have been better if the servers had not gone down, but that can happen on any system. They also followed up for the next couple of weeks to make sure that things were running smoothly.

I was very impressed with their customer service and would highly recommend them.