I would definitely get a PNP- we've used ours SO much!
We do have the one with all the crap (music, sounds, vibration, bassinet, changer), and the only thing we used was the changer, but you definitely don't need that. I would never ever use the bassinet attachment- it seemed so unsafe! We would just put DD/DS in the PNP itself.
It's great just to have them sit/lay in to play with some toys- we probably used it for that more than sleep! Although we did use it for naps a lot. We've taken it on all our trips too since we've found that even at fancy hotels, the cribs/PNPs they provide can be scary.