As someone who lived near Highbury Islington for a few years, it's not bad at ALL. If you don't head UP Holloway Road, it is really a lovely area. I swear. Even up Holloway Road is getting better. There's even a Waitrose.

There are LOADs of pubs and shops and cafes that I still miss from my time up there. If you are looking for a real "local" type put, try The Compton Arms, a five minute walk to H&I. It's a dive, but a really fun local.
I can give you tons of recommendations for the area if you want.
Good luck.