I had recently mailed my ommp ppw in and had all the items needed to qualify as a med patient and was told that "their system" couldn't take it without a specific number. Other dispensaries have had no problem. Their flower is probably some of the best around but ridiculous to make me pay rec prices after paying for all my medical costs and application fees.
The convenience of pre weighed purchases saves a lot of time. They'll even hold the jar up for you to get a closer look & a sniff (well it is required you can't touch the jar) but if you pretend its a service instead of a requirement you'll be nifty!