For anyone interested in Now TV, I use this website
http://www.artesea.co.uk/nowtv/ to keep track of the boxsets as and when they get put on.
Mad Max, If you have a means of displaying it on your TV for free, ie connect a computer to your TV then give the 14 day free trial a go, nothing to lose.
I like the service and the PQ is acceptable at 720p, sometimes you are against the clock to watch shows so you need to take that into account.
I agree it is a pain that some shows are only on a 30 day catch up service but I guess if you want a comprehensive boxset service then a Sky sub is the only option. If Now TV was made too good then it would take business off Sky (even if it's the same company)