Well I think they are great! Big fan. I love the privacy too.
When a door’s lock doesn’t line up—stick a foot underneath the door by the latch-side (not the hinge side) and lift up until the lock lines up with the slot. The problem is virtually always that the door is sagging.
When the door doesn’t have a hook—slip your bag’s strap over the latch-side corner.
How to know if a stall is full without looking under—stalls usually have slight gaps between the doors and the walls-between-stalls. Not enough to actually see anything, but enough to make out if there’s a shadow in the stall or not (shadow = person). Don’t get close or anything, just look for shadows as you breeze past the stalls. Less invasive-feeling than peeking under or accidentally pushing open a door with a faulty lock.
I definitely thought I was supposed to use my foot to flush this kind of toilet, because otherwise I feel like my face is right by the bowl when it flushes.
I’ve had auto-toilets flush too soon too because I leaned too far forward or to the side… unpleasant! So is finding out that the stall is out of toilet paper; luckily this happens almost never for me, and I usually notice before I sit down on the few occasions it does.
My only real complaint is when they don’t have receptacles for feminine products—I really don’t feel like carrying bloody cotton items out of the stall with me.