I've got a Furuno
WS200 - not sure if that's what you are looking at or if they have changed - mine is just a relabeled Airmar.
I've been very happy with it. The only time I have questioned it's readings is when the wind
is coming from a certain direction, and I think it's all about my installation
, not the instrument. It want's unobstructed windflow, and I ended up a slight obstruction from one direction. It's part of the inevitable compromises on a boat