I also use a Voyage-Air. I have two: a custom one that was built for me by Harvey Leach, the inventor and a mass-produced OM-4 model. I do both strumming and finger picking and the OM-4 performs very nicely in both situations. The OM-4 is a demo model that I tour with and is for sale.

The unfolding and folding do not affect the instrument at all. In fact when you unfold the guitar you only have to make slight adjustments in tuning. Strings seems to last a wee bit longer than regular guitars.

I appeared on Rik Palieri's "Songwriter's Notebook" a while back with a Voyage Air. The one that I have is a VAD (dreadnought size). Here is the video

Debra