speed and uptime are excellent. frankly, i can't tell you much about support; mainly because ever since i uploaded my site and got it running about a year ago, i've never needed to make any change to the code or upload anything. so basically, i've -never- sent it any support requests ;-) its a good think actually, means that i never ran into any problems that required attention from the sysadmins.
again, speed and update are superb. give them a try