I tried it once round trip. WiFi was so-so, a bit spotty at times, seats weren't bad, but at the end of the day it's still a pricey bus. The bathroom was decent, meaning I didn't get the typical $5 of negative utility penalty when I have to use a bus bathroom.

My NYC->BOS leg I was in the left aisle (single seat, no neighbors on either side), which was a much much more enjoyable experience than the BOS->NYC leg when I had to sit next to neighbors in the back-right of the bus.

Oh yes, unlike the Chinatown buses, I don't recall the driver talking on a cell phone the entire time.