I have been a happy Fastmail customer for a year now. I prefer their webmail interface to any software other than mutt because of its excellent keyboard shortcu

I have been a happy Fastmail customer for a year now. I prefer their webmail interface to any software other than mutt because of its excellent keyboard shortcuts. CalDAV access to my calendar has been very stable and CardDAV access to contacts (the feature I've been waiting for) is in beta now. I have seen a small bug related to shared address books (I have a "business" account) on Yosemite, but other than that it has been rock solid.