I stayed in a triple room with 2 other friends during the Fringe Festival recently.
On arrival we were told that the rooms weren't quite finished, but we could leave our bags in the room and the bathroom had been cleaned. OK we thought - that's fine, we'll go out and come back after dinner.
A quick look in the dining room while checking in and saw the uncovered breakfast cereals and other breakfast items still in the dining room - at 3 o'clock in the afternoon! The room did not look clean and we decided at that point not to have breakfast in the guest house.
When we came back downstairs we were told the rooms had been cleaned - I pointed out that there were still balloons and other debris in the room from the previous person .... OK they said, we'll have another look.

We returned later and had to ask for clean sheets on the beds as they were dirty, stained and had several (not just a couple) hairs on the sheets. The bedclothes had obviously not been changed since the previous occupants. After waiting about 10 mins we had to ask again - and then were asked to wait downstairs (in our nightclothes) while they changed the sheets.
During our 20 min wait the 2 children (one aged about 3 and the other a baby) belonging to the owner/manager were being put to sleep on the tables in the dining room!!
When we were allowed back into the room - to discover they had tried to stretch a single sheet over the double bed, which during the night obviously became untucked and uncomfortable to sleep on.

The owner/manager was extremely unhelpful and the hotel was unclean and unsafe. Light sockets in the bathroom were all hanging out on the ceiling, no cover on the lightsocket in the bedroom, the kettle arced when plugged in, and not a single fire extinguisher was in service date (some were completely unpressurised - useless in the event of a fire).

We had nowhere else to go or we would have - it was the middle of the Festival and Edinburgh accommodation is scarce - but I would never recommend this place to anyone. We spent as little amount of time as possible there .... and by the way, the place is not a 5-10 min walk from the town centre (as they advertise), unless you are an Olympic sprinter - it's about 20-25 mins fast walk.