I think you would find they are mostly pretty good at Camden. To some extent it depends on what you want. Certainly Curtis are excellent and have some nice equipment but Airbourne have some lovely gear too. Are Camden Aviation still there? Also pretty good but different equipment. Gostner Aviation offers a remarkable range of licences and testing and is supposed to be getting a DA 40, complete with Diesels, glass cockpit and the lot - and of course they have access to Joe, hopefully. Then there is the Scouts and the other Air Cadet mob. All very professional and mostly very friendly. Anyone, I've forgotten?
The big advantage of Camden is that you have a very user friendly airfield, no tower (cheaper!) during the week, minimal waiting faffing around, taxiing and transiting. The airfield itself is the main differentiator compared to the big guy up the road and for my money is far preferable and well worth the short extra trip down the M5!