I signed up this year on a $12 sale day. It's OK. There are more Quilt in a Day videos free on their website than on QNN. Some of the Fons and Porter things are OK, but I guess their personalities just don't grab me as much as Elenor Burns or Jenny Doan.
Most of the machine quilting videos I have seen are for long arms which I don't have. I'm hoping to find some on there for a domestic machine.
All in all, I'd say if you get it on a $12 sale day, it's worth a try. You can't do much for $12 a year so there isn't much to loose.