We have just started to use these fantastic frames at Creative Flyers, and are looking for some feed back on them. The Z Arm design is fascinating, it really gives the camera a clear field of view but does it affect the GPS, we are running those tests now to see. 

As you can see from the picture these Vulcan UAV frames are very well manufactured. They have carbon fibre centers and the arms are made from aluminium alloy, making the frame very durable as well as light. 

They are also foldable, but only straight foldable, not able to fold up and down, this still makes them very easy to transport and the folding leaver is very easy to use and has a built in failsafe.