Rob had a decent article on Norwegian Rewards earlier this year: http://www.headforpoints.com/2017/03/30/is-norwegian-reward-worth-joining/
Yeah, with the new InsideFLyer/Norwegian partnership I've been taking a closer look myself and there's some excellent value to be had in some areas. I'll try and get a post out about it next week - the Premium Flex tickets in particular can be absolutely brilliant.
