J class seat pitch
The seat pitch is really not that big a deal. it is noticeable that the window seats get a bit more room but the tradeoff is that you are more "boxed in" than the aisle seat which have a larger opening toward the aisle and a more open feel. your feet do slide in under the seat in front of you (actually the fit under the side table used by the seat in front of you) but I didn't think it was a problem - there was still room to be comfortable. IMHO, the pitch difference isn't a big deal and it comes down to a preference for aisle or window. For a "large" person(don't know how to say it more tactfully), the space you have to squeeze into the window seat from the aisle is pretty narrow (my guess is less than a foot) so an aisle might be more comfortable. also, if you like to get up/down a lot, even though windows have direct aisle access, you really can't get out of the seat when the tray table is open as it blocks your exit.