Don't have any other rec's but I will say that I've had good luck with my banjo brothers grocery panniers. I really only use them for a round town errands and casual stuff (not commuting). You are right they do not lock on but I'm sure there is a way to DIY that. Mine have never fallen off and they hold a grocery bag perfectly which then extends over the top of the bag, so you can load the grocery bag pretty tall and they handle weight well. I've had them for 4 or 5 years and they are pretty much like new still. Of course as with any rec, YMMV. For the price I think they are a good value.