The CPL school is there to train people not just to pass the exam but to be suitable for a career in commercial aviation.
I agree with that, if you think Colin is bad, then wait till you meet your type rating instructor/examiner. He/She will have no hesitation in (vociferously pointing out your shortcomings) especially if you fly (badly) !
Did my residential CPL at Stapleford and no real complaints. The only frustration was the bad weather days when you had to find something else to do and the occasional cancelled session when something else came up for the Instructor. In aviation, you have to be adaptable, so you could say that is all good practice.
Good to hear that Staplefords equivalent of james Bond 'Stapleford 007' is still going strong, cheers Brian