I didn't do a lot of shopping around, but I chose them because they appeared to have a good customer service, good pricing for single-person use, and all the fe

I didn't do a lot of shopping around, but I chose them because they appeared to have a good customer service, good pricing for single-person use, and all the features you might want like support for your own domain name, email aliases, caldav, etc. I have been a happy customer for years and all of these things turned out to be true. I have had zero reason to even consider looking elsewhere. Also the web app is really good. Like really really good. And I don't normally like web apps.