One thing I find very helpful is when the provider has a clock in the room. Preferably with large digital numbers (as I don't wear my glasses during playtime). I often completely lose track of time when in a session and I do like to know how much time is left. If there is plenty of time left, I can slow down and enjoy it, but if it is getting close I can pick up the pace and finish in time. I know most of the providers I see are not clock watchers, but I still don't like to overstay too often.
I think many of us hobbyists who don't do BNG or half-hour dates could find a clock on the nightstand useful.