Are you happy with the bugaboo bee. Have you bumped it up and down steps at all. Im just trying to work out if its sturdy enough. The video in the advert drives me crazy with all these stupid people dancing round with their pushchairs. Id rather see them outside going over some cobbles or trying to bump down/up some steps , cope with high kerbs or getting on and off public transport. Please tell me its tough and brilliant for all of this. And what about the brakes - do they catch on steps? Ido want to buy one but I also want to be sure before spending a fortune!!!