Got to experience first class on 737-800 on ATL-EWR route. It is usually serviced by MD88/90s. I must say it is a big step up. The seat was actually comfortable and plush. I can get used to this. On the return trip EWR to ATL, I sat in the middle seat in C+. No noticeable changes except for personal entertainment system. Really like the fact that you don't have to use your phone to watch movies draining the battery.