I truly like the "lay flat seat" line - that must be the Mile High Club equivalent for Business class.
If you are just talking about the seat for your own and sole convenience, then this is the right forum.
You should expect a flat but not horizontal seat of a somewhat ancient making. I find the seat very hard and so I don't use it as a bed but sleep in recliner mode, so I won't glide under my frontman's seat.
It's penty good enough for the short hop from LAX.
If you want to work, make sure you ring a computer power supply which is capped at 60W otherwise the seat's circuit breaker will trip. I hate that bit.