That's great to hear!
From that performance review I read, their numbers were impressive.
So far, I have had a great customer service experience with SliceHost. I when for Ubuntu 9.10 (Karmic) and was able to get up and running quickly using aptitude to set up Apache2, PHP, MySQL and OpenX.
I had such a negative initial signup with Linode (because of living outside of the US), that I did not make it to the technical part of the game. SliceHost customer service resolved the "flag you because you are out of the country" in minutes v. hours and painlessly.
The good news is that you had a positive experience. I am glad to here it!