C.B.
I waited patiently for almost 6 weeks for the Pac Bac to come in....but I ran out of time.,....in desperation I bought the enclosed, zipper around style (sorry, I can't remember the name of it but it is always listed next to Pac bac in the catalogs), I would not dream of traveling without this...I prefer the enclosed style because it allows for extra storage space (ie toys, blankies, etc)..we traveled quite a bit last year and twice I was over the weight limit by a few pounds...so I just put the non-essentials in the carseat carrier and all was fine..much more comfy too!!!!
Good luck!!