5 *
Due to company policy, I think I have stayed in every 5 star hotel in Edinburgh. I remember checking in once, at the same time the Eurythmics were checking out, just in front of Dave Stewart in the line
I hated 5 start hotels. Why?
Well company policy was that they would pay whatever for the hotel room, but food was fixed at a ludicrous low allowance. So I would pass the restaurants knowing that I could in no way afford them, and instead have to find a burger joint instead. That was fine, but the other thing 5 star joints expect is that you will use room service for everything. So no tea or coffee making facilities, and since room service was extra, again i could not use it.
Eventually I worked out that hotels are hotels, you get a bed, a shower and a TV, and you really don't need anything else, so you are better off going for a 2 or 3 star hotel, since they don't expect you to have a platinum American express
(My boss, would often have to go to Stockholm. Sometimes they would put him up in the best hotel, the same one Nobel prize winners would get. My boss had a predilection for lounging around in old cycle lycra gear. This used to confuse the staff, who could not work out whether he was allowed to be there, or whether he was an eccentric billionaire)