Is your LO a heavy wetter, and are you looking specifically at the GoodNights or regular GMs? I haven't tried their NNs yet but I've used the regular ones before with a fleece-topped bamboo booster with no problems - that said, DD is at worst a medium wetter. Their biggest plus is probably that they're a trimmer fit than the WNs.
I haven't tried the new WNNNs yet but have my first one on the way
. They get rave reviews from most people, especially for heavy wetters, and I like that you can get them with a stay-dry, won't-show-stains inner. I'm thinking I can probably get away with one or two hemp boosters instead of the trifold bamboo insert, which should make it slimmer, and they're gorgeous and quite good value... I'd probably say go for the WN!