I have used few companies, but will review IX web hosting here.
They are not ideally suited for critical websites, as in some months you get a lot of down time. Support is reasonably okay, but occasionally takes too much time for reply.
Control panel is easy, but I would have loved to have a cpanel.
Good thing about their service is that they offer different IP for add-on domains and most of them would be in diff. class "C". That is pretty helpful in SEO point of view.