As past guests have said, the bathroom is a real issue. During my stay the toilet flooded and sewage got all the way into the kitchen and bedroom area. Very unhygienic. Random wiring hanging around the bathroom also poses a safety issue.
The house itself was dusty and mouldy, and didn't seem to have been well-cleaned between guests. Bedsheets and sleeping areas were not replaced.
In terms of facilities, the apartment is very old and poorly maintained. There is no heating and the bathroom area got as cold as 16c in Feb, while tiles and wall surfaces were falling off.
Halfway through, I paid a penalty just to be able to move out early, it was that miserable.
Perhaps for the truly budget travel, but I've found better places in Taipei for the same price.