I guess it is different if you have only a small account with them or something, but I have a 1and1 Dedicated Server and there hasn't been a problem at all..
The thing is zippy quick and as stable as I let it be. I have full remote console access (terminal services) and it just plain works. Maybe this is all new sfor them as I've only been with them since February. I tell ya what though, it's FAR better than the VPS I had with aSmallOrange.