We use SoftLayer to run a few hundred nodes and they have issues as well. For example, their network sucks and they have high rate of hardware failure (sometimes hard drive failures are off the charts).
I definitely agree with you on the disk failures, and that's something I need to bring up with our account manager.
The above said, the network has been solid for us at SoftLayer for the last 1 1/2 - 2 years (things were rocky for a little while before that as the client base outgrew their capacity). Of course, your systems might be in different data centers to us so mileage may differ.
