They are ok up to a point but it does become tedious when a high street is swamped by them. The Northcote Rd in Battersea has been ruined by them in recent years. Even a few years ago it was full of quirky shops which is why I loved it.. now it's over run with the likes of Jigsaw, Space NK, Starbucks, All Bar One etc, and no amount of local protest could stop it. Also you don't really need a Waitrose as Ocado deliver to SE22 anyway (although I agree it's the nicest shopping experience of all supermarkets).