Congratulations on your new Zenithstar.
About a week or so ago, I purchased the WO binoviewer package, but haven't had a chance to really evaluate it properly yet because of focus issues in my scopes.(I opened a thread recently under equipment, eyepieces). All of my comments are based on use with newtonian reflectors, and not being able to get enough in travel on my focuser. However, this can be fixed. You won't have these problems with your WO scope.
Like a previous post, I suspect but can't confirm yet, these will probably work better in bigger scopes, but I had a lot of fun with a 5" reflector, having said that.
My impression so far is that the package is great value ($309), and includes the 1.6X OCS and 2 pretty good 20mm 66deg ep's. The finish and fit looks very good and everything works well mechanically. Collimation looks very good too. You can't go wrong really.
I'll have more to say on the subject soon hopefully.