I've been in the web industry for over 10 years and have used a fair few hosting providers, with mixed results.
The moment I set up my own business I decided to move everything away from Heart Internet to 20i (Heart had been great for about 5 years then after a series of badly handled catastrophes and general declining service levels - enough was enough) - as a small business I don't have time to worry about the hosting - I just need it to work so I can get on with dealing with my customers., and with 20i it does!
I've been using 20i for over a year now and not once have they let me down, support tickets are answered quickly and effectively, even to the point where they suggested changing packages to save money! My website down time has been minimal and the website speed is amazing compared to other hosts.
Reliability, easy of use and service are exactly what I want - I recommend them to everyone! Well done 20i - please never change :)