I have been a Media Temple customer on and off a few times over the past 10 years. I had moved about 20 sites to MT once again, about 2-3 years ago, before they were purchased by GoDaddy.

I had had issues previously with the Grid service, but had never had any problems with the DV service (other than being horribly skimpy on resources). I started seeing Grid performance issues again a few months ago, and they've only progressively gotten worse.

Suffice to say I'm leaving Media Temple again, and even though I have services at GoDaddy, and had been considering giving ManageWP a try, I think I'll just sit back and wait to see what shakes out.