I have to admit that I am really unhappy with our service, post the IP change, as I think they have seen it as an opportunity to increase the amount of accounts on the server. The load is never really 'low', for any great length of time at least, and more often than not it clips over its safe limit and then we get page loading problems.
I have just renewed our contract in October so we'll have to stuggle on, but next year I'll get us a new host.