I'm a newcomer too, both to FH and to the forum, but I'm going to be bold and welcome you anyway! I'm too on the Sydenham/FH border (actually, I'm really in Sydenham, shhhh, don't tell).

I agree about the FH Sainsbury's - it is a bit rubbish, but OK for picking up bog-standard stuff. I actually visit the one at Bell Green by bus (the 356), I wouldn't say you really *need* a car to do your shopping there. Also Sydenham high street has a green grocer and turkish grocers where you can stock up on bulk amounts of useful stuff.

I've not noticed much in the way of crime, but then I'm a hardy Londoner-type (I'm new to FH, but grew up in SE London) so maybe I'm a bit oblivious to stuff.

Enjoy the views!