The guy who did the shampoo was very rough. I had to wait in the entrance with my wet hair. The lady who cut my hair was ok but really didn't seem to care about what she was doing.
The haircut was ok, nothing went horribly wrong, and it's only £25 for a shampoo + cut in Central London, so I guess it did the job for a quick fix.
I wouldn't recommend it for a drastic change/cut, serious haircut advice or a nice relaxation time though!