Fast mail are generally good at support, so unlike google you're not dealing with a black hole when something needs to be fixed.
Yes, but their terms of service are absolutely preposterous (unjustified and unannounced termination at anytime).
Most mail providers can terminate users for any reason, but at least with a few days of notice, allowing you to move the data elsewhere.
This is the biggest reason I am hesitant to try fastmail.