I've been to Montclair Center Camera Exchanges a few times to pick up supplies when I was in a hurry. They are a small store, so their selection is limited. I also feel they are overpriced, but that's typical of a store that size. The location is more convenient than other local photography supply shops, but if you want better selection and prices you might want to look elsewhere. They also offer a range of processing services, which I have not tried. But overall it's not so bad if you're in a hurry.