I have only used
BCP once (in September) as I am not a regular at LGW. They were fine, prompt delivery and collection and polite service.
For example, on departure, the bus we were loaded onto, developed an electronic fault - the brakes were locked on. They had us loaded onto another coach in less than five minutes. I was impressed and would use them again.
Follow their instructions for finding them and allow extra time for that and the return coach journey to the terminal. So it's a simple trade off of time and money!