In all honesty, although that lay was successful, It was paying $4.20 on the tote, so I didn't get on with Betfair. I would endevour to lay at no more than around $3.50, but some may wish to push it further. My main problem with this system, is working out which horses will be warm favs without sitting in front of the computer all day. At the moment i am just checking the form guide, and looking at the assessers odds. Any advice on the matter would help.