I'm quite tall so I appreciate the bulkhead seats. I'd fit in the other rows as well. Some complain that the seats are more worn on the bulkhead row. I suppose my bum is so padded I don't feel it.

The lav in place of 20AB is kind of the third lav for Business class so not likely to be very busy or that there'd ever be a queue. It depends on the crew if they let PE pax use that lav.

Many prefer row 23 for sleeping as there is nobody to kick or pull on your seatback. It's very likely that by row 23 they will be out of the more popular meal.

Oh, and take some snacks with you if it's a long flight. You'll thank me afterwards.