The Wing Zero EW SD is a cute one and has some nice parts, notably the four wings (two small in the back which help support it).
It comes with the twin buster rifles, which you can use in each hand or attached together to form the combined version.
The sticker sheet has one set of cute eyes, four foil camera lenses (guns/arms) and two golden rims for the shoulders, which can be a little tricky.
Interestingly, the swap side of the eyes are actually transparent lenses set in a black frame, which is quite premium. Additionally the camera lenses in the forehead/back of the head are also transparent plastic, no stickers.
It does the two different poses well, notably the twin buster attack and the descent pod where the wings fold in front (although you have nowhere to store the rifles in that mode).
The kit is compatible with the Cross Silhouette inner frame system (sold separately) and while it's a nice little upgrade, it doesn't do terribly much for this particular kit, especially if you're just going to have it in the one pose, but it's an option.