I've got a medela swing just now and it's fine, but I'm struggling to fit in 30-40mins every few hours to pump. Obviously a double pump would cut the time down but they're so expensive. I've got money aside for it but just can't decide if it's worth shelling out for - was looking at the swing maxi double and the cheapest I can see it for is £170. Has anyone used it, having used a single, and found a massive improvement in supply?