I forgot to mention a few other things about the seat. The tray table is enormous. I think it's significantly bigger than the business class table. Great if you like to spread lots of things out on your table (like a computer and paperwork, or meal and multiple drinks).

The other cool feature of the tray table is that when you slide it all the way forward, you can get in and out of your seat while the table is still down! (This only applies to aisle seats.) Handy for going to the lavatory before they've picked up your meal tray.

And one other nice feature is that there is a fold-out drink holder that you can use when the tray table is folded up. Between that and the little drink table on the armrest, you have two places to put drinks without pulling your table out.

I haven't tried any other airline's premium economy product, but based on what I've seen online I would bet that JL's PE seat is the best in the industry.