It is hard to tell, because different people have different levels of "clean".
If the OP is happy with the results, then fine, but that does not stop us and the pro detailers on here from giving advice and opinions.
Personally, I think £45 is cheap, but then again, we don't know what was used and what methods were employed.
It might be worth checking for swirls and the like.
Just hope it wasn't the girls and guys off the recent Apprentice