I've had MPServ for a few months now and decided to leave my review.
Performance: 9/10 Outstanding network. I have almost no network lag and the performance is far better than any other host I've had before. Server hardware is decent too.
Price: 9/10 Quite good for their performance.
Uptime: 9/10 They provide DDOS protection separately, so other than the times when your service is under a DDOS attack, your service will almost always be up unless the downtime is on your end.
Support: 6/10 A few months back, the support was wonderful! Quick support, friendly and helpful staff, and easy to resolve a problem. Nowadays, the support almost always takes at least an hour to get a reply back in some cases up to a whole day or two. When they do get back to you, it's a rather poor reply that may just give you a question you don't quite understand instead of an answer or helpful advice.