Heart Internet are complete cowboys, They offer their reseller account (which I used just for my own sites) at ยฃ35pm but the reliabilty is just a complete joke.
Support is practically non existent as you can only contect someone via a lousy ticketing system which, by the way, is in your control panel, which is hosted on the same server your site is on so if your site is down you can't log in to your control panel and hence you're on your own until they've read their Dummies Guide to Running a Web Host and fixed the problem.
Too many outages, Page load times are anywhere from crap to ....well, not loading at all, useless support thats not there when you need it, and limits on file types you can host. Just what are they spending my ยฃ35 a month on? (or were - I left them now).
Cowboys - Avoid!