Kaz - you cannot compare the EF one with this CMPro one as they are worlds apart, I have seen the CMPro one but not flying. The EF plane is 68" whilst the CMPro a proper 40 sized plane with glass fuse. If the CMPro Katana 50 is anything to go by as a referrence then the YAK should be nice. There is a review here of the Katana and you have to see the video.

The YAK's construction is very nice and you need not worry bout it.

Only thing about the CMPro YAK is that whilst its nice to have plug ins but for such a sized plane it makes it heavier. The wing loading is in the region of 28-30 oz ... that is quite a but for a plane this sized. Still my Global Raven has the same wing loading but it does fly very very nice. Hope you have fun!