I'm in the beginning stages of migrating from an internal exchange server (2003) to external hosted services. We don't have a huge user base, less than 100, but we need to support BlackBerries, iPhones, Outlook RPC/HTTP, etc.
I really like exchange hosted providers (I've used intermedia in the past) but pricing is a bit high.
Does anyone have any experience with Kerio? It looks great, but I'd like to hear some unbiased opinions. Or biased if you are really happy working for a particular hosting company ;-)
EDIT
I don't need any special compliance or reporting. I'm just looking for the basics of hosted email.