If you can get Plus at a reasonable cost (like Plus campaign for 7000 kr to all destinations a few months ago), or even the Plus Saver tickets at about 10000 kr to HKG it is reasonable value. The seats are comfortable, especially in the new cabin, and food/drinks are basically the same as in Go with some extra food options and that all is included.

Personally I usually pay for Go and use points or courtesy upgrades to get into higher cabins, apart from when there is a good deal on in Plus - in which case I book that and try to upgrade to C.