Yep, and that's why I watch as many Youtube reviews etc, as I can to see how tight the zipper is, what pockets it's missing, how the strap fits on tall/short people, etc. The more expensive the item, the more research and time to decide for sure. But I've still never returned an item that did not live up to my expectation, rather just note that flaw for my next purchase. This goes for my handbag purchases as well as my other non handbag purchases.
In the event there are zero reviews out there to help me make my decision, I do buy the piece, only if I've tried it in stores. I did that recently for shoes. If they end up hurting my feet, well then... I'll have to find more places to sit to wear them.