First post!
Got my own VF-1S today, It also happens to be my first Macross/Yamato toy and it looks so cool!
Voted for the first option after playing around in Fighter/Gerwalk modes, kinda jumped the gun a bit there as I ran into my first issue during battroid transformation, just a small problem with one of the legs/intakes.
Given that it was my first time playing with one of these things I took extreme care when transforming the toy, however during the transformation to battroid I discovered that one of the locking tabs had split apart, this part of the manual points exactly at it here. If you look at the inset at the top left hand corner of the page numbered '2'. The arrow points exactly at where it's fractured on mine, the split is on the outermost edge of the tab where the pressure is when you tilt the hips inwards to disconnect them from the fuselage, This piece will probably shear off completely after another transformation.
Other than that, theres a stiff left shoulder & elbow which ill loosen up to relieve stress placed on the shoulder while posing, no biggie.