What's a reasonable standard for rental equipment maintenance?

Addendum:

Charter ops take terrible care of their gear, I sometimes can't
believe the shit they rent out. If yer traveling and renting:

Rent yer reg at yer LDS (hint that you might be in the market to
buy) and take it with you. If the inflator hose is incompatible
with the BC you get, rent just the inflator hose. It takes 30
seconds to change one out.

Take some O-rings and a pick with you. If the O-rings in the
rental tanks look fuzzy, put in yer own.

Check yer tank pressure asap. A 700 pound fill is a bummer when
it's discovered at the dive site.

Take yer own pocketed weight belt with you, get yer lead at yer
destination.

Don't accept gear that ya don't like the look of. You may get a
dirty look, but they'll always find something a little better.