This is a slight bone of contention with me and I'll preface my comments below by saying that it's very age group specific and that if your son enjoys it then that's the main thing.............
I don't agree with the whole premise of the Chesterfield FC 'academy', in the same way that I don't think places like Qualitas, Kickabout, YP, BSFA, Evo etc. should be allowed to use the suffix 'academy' to describe what they are providing. They are all essentially grassroots level organisations, although most of these run as 'for profit' organisations. People I know were even asked for around £200 for kits on top of £50 per month subs. They all played at a standard below the team that I coach.
We charge £22 a month with nothing additional for anything that we do and I frequently arrange games against the development teams of EFL and PL clubs to test the players and hopefully get them spotted. I've had 2 players sign for the pig academy this season and have another on the verge of signing academy forms. Since I've been coaching the team 6 players have signed academy forms with teams from Blades, Lincoln, Derby and Pigs. I know I'm qualified to the same level as the Chesterfield FC coaches because a few of them were on my UEFA C course.
What Chesterfield FC use to their advantage is the badge and kit of Chesterfield FC to try to elevate themselves in terms of parents and players. Whenever we've played the 2 Chesterfield teams at our age group we've beaten them comfortably and me and the lad who I run the team with have been asked a few times to move over and become the Chesterfield FC 'academy' team at our age group.
A genuine academy is completely free of charge and provides Uefa A/B level coaching at all age groups. The ones discussed above are not at this standard and therefore shouldn't be trying to kid people into thinking that they're paying for some kind of premium service.
Sorry, bit of a rant but I've seen a few kids get very jaded with football as a result of signing for these places and the promise that they'll become a footballer one day seems to be underpinning it all, it's a all a pretence as far as I can see.