Very good point. I tried to make one for my watch and there was nothing in the app in the nearest 5 stores. Ended up going into reading just because they can see slots further out so I'm booked in for the 30th
My first experience of 'genius' and not impressed so far..
I suppose they are a victim of the own success, I can remember being able to get next day appointments around the time of the 4s, every year the delay for an appointment seems to get longer.