I have been with sibername.com about a year and a half and must say that they met my expectations.
I'm the webmaster for about a half dozen sites. Their packages include many great tools, easy to use with very good video training available. I had some problems with setup and their customer support was responsive and solved all the troubles. The support team is always there and drops a message from time to time to see how you are getting on. Speed is pretty fast and I can say that uptime is great (99.99% as promised) + my website is always accessible to my visitors and clients. I am happy about this. All in all, the quality of the hosting is very good, I can proudly say I am hosted with sibername. Keep up the good work, thanks!