It really depends on how much love a specific blade gets from Stiga. I have had the following blades:
Allround NCT: Finish was alright, the coated layer wasnt suitable with all glues
Intensity NCT: Same as Allround NCT.
Infinity VPS: Poor finish, rough handle, sharp edges. I did get one when it first came out. I feel like the new ones are better.
Cybershape wood: Alright finish, allthough the top ply did get a tiny splinter after the first rubber change.
From what I have heard then new Wavy blades seem to have a good finish.
Generally blades made in Japan or Korea usually have the best quality finish: Butterfly, Nittaku, Victas and Xiom.