Had a very pleasant flight on the 321T in F last week. My first time on it in F in fact. 4A was a lovely seat and I had the feeling of privacy in a seat that was very comfortable sitting up and in a reclined mode (something I often find difficult on flat bed seats). In flat bed mode it is a little tight if you like to sleep on your back but as I'm a side sleeper I was fine. Service was great too. The cabin had a lot of non revs but the flight attendants prioritized serving the revenue passengers which is always appreciated.