They don't call back.
The only problem I have is there are never any appointments when you call. They say call back the next day and there are never any. They will try to give you an appointment within 24 hours to meet targets but after that they really don't care. The GPs are good when you do see them. The receptionists need training to recognise emergencies. Also they say they will give you call back and then tell you to call at 1PM. They don't call back. You waste time waiting around.