
Having used Rackspace for over 5 years, I can say they are a great hosting company with top-notch support but very much on the pricey side. That's because they include Fanatical Support with the price, so everything is bit more expensive than you'd find at Server Beach, Softlayer, and others. I really think they should offer prices with Basic Support for cheapskates like me.
Whether their IPO is a long term success or not will largely depend on their cloud computing play called Mosso. Otherwise they stand to lose to Joyent and the grandaddy Amazon's AWS. Well that's how I see things anyway. I wish Rackspace the very best - they were always there when I needed them.