I learnt to fly there. They are a nice bunch of people and the training is excellent
- but I would say that... from what I hear they are good value for money. But since I live nearby I didnt look very far.
I looked at Cabair and decided they didnt have the social feel I was after, many who have started with them moved over for similar reasons. But they do seem professional so dont let me put you off having a look round - I think they are better suited to career types.
Flying from Denham is a lot easier for locals than you might think (nice lakes for visual reference). It is well position for most journeys - as you say LHR airspace make you and everyone else funnel down over Farnborough (That is a busy piece of airspace and Farnborough deserve all the praise they get). But if you are further south then you have the problem going north!
As for club atmosphere - mmmm not its strongest side - no bar/cafe, there is a social side - monthly meet for beers and organised group flying days, BBQs, Xmas Party etc - I also believe they want to improve things in this area and anyone who wants to be part of the social scene will be most welcome
Many people also form loose groups for trips etc. I did Marrakech with another plane (halfway - we then took mine the rest), and Oban-Scottish Isles with a couple of other planes this year amongst other trips
I have my own plane so I cant really give much info on the rental side (although I did fly most of them whilst training) - but they have lots of 152s,172,PA-28 etc. with varying degrees of age and avionics.
There is a rail station a short ride away and very easy access from M40 and or M25.
You dont mention why you want to fly, or where you currently are, so I cant add any comparison.
Hope that helps...