Size comparison with a cigarette pack

The kit consists of 4 mechs that can be separated and combined.

It's noticeably bigger even compared to the RG First Gundam.

Reasonably decent limb articulation

Opening the bottom locking pin lets you shift the hip joint.
The pin itself doesn't hold very well though, and it keeps popping open on its own.

The transformation mechanism limits the shoulder range of motion,
but the shoulder armor does spread open and let the arms raise out to the sides a little.

They've managed to pack in a forward shoulder-swing gimmick on top of all the transformation mechanics — pretty impressive use of space.

Galeon's mouth is articulated, though it's normally posed in an open position.

Two types of hands are included.

To transform into Galeon, start by tilting the head forward and swinging the shoulders back.

Rotate the Galeon head up 90 degrees and it tucks inside.

Then rotate the Galeon head 180 degrees horizontally,

and rotate the lower body 180 degrees as well.

The 4 ducts on top can be opened.
Open one and the other three all link together and open at the same time.

To combine with Gaigar, you need to swing Gaigar's shoulders back and lower the locking pin that's hidden on its back.

The caterpillar tracks are actually assembled link by link — the kind of thing you'd only expect to see in a high-end military tank kit.
Thankfully the connections hold together well and don't come apart easily.

You can pull out the locking pin on the underside of the foot and secure it to Gaigar's wrist.

The side windows in question are PET stickers, and thanks to double-layer printing, even the opaque window frames are rendered with a nice sense of depth —
way more premium-looking than regular stickers.
Best of all, no worrying about the stickers getting scraped off during combining!

All 8 wheels on the bottom are movable.
They don't actually roll that well, but it's just fun that they even bothered to make something like this functional.

You can combine Stealth Gao and Liner Gao using the joint parts.

To prepare for Final Fusion, first fold Gaigar's feet and push the shins inward to shorten the leg length.

Rotate the upper body 180 degrees, then open the side skirts.

Detach Drill Gao and unfold it as shown above.

Next, push the fixing pins on the back of the legs downward to lock Gaigar's legs firmly in place.
This top-and-bottom locking mechanism makes the connection between Gaigar's legs and Drill Gao really solid.

Push the caterpillar tracks back in and press them flush against the back of the legs.

You need to spread both sides of the thigh armor outward, but they don't open very far.
You have to apply just the right amount of force — too much and the armor pops right off.

Rotate Gaigar's arms 180 degrees,

then tilt the shoulders back and push the fixing pins on the back downward.

Once Liner Gao is centered in the torso, close the fixing pins on the back to lock it in position.
Those fixing pins on Gaigar's back really come in handy for all sorts of things.

Now fold Gaigar's arms all the way back and position them as shown above.

Now attach Stealth Gao to the back.
At this point, Gaigar's arms — folded all the way back — fit perfectly into the open space in the center of Stealth Gao. (Thrilling...)

Extend both sides of Liner Gao, then raise them up into the shoulder position.

Pull the wheel section on Liner Gao downward, then pull out the forearm part.

Remove the jet engine cover and pull out the locking pins on both sides,

You need to fold the elbow while pushing the fist out... but it doesn't always slide out smoothly.
You'll just have to figure out the knack for getting the fist out.

Push both locking pins back in to secure the fist.
Using the pins on both sides like this locks the fist firmly in both the extended and retracted positions.

Finally, attach the jet engine section to the arms and Final Fusion is complete.

Accessories included for GaoGaiGar

The driver blade is made of metal.
It's sturdy enough to actually use as a flathead screwdriver, except the tip is angled, so that's a bit...

There's a spring-loaded extending gimmick in the middle,
and all four cylinders come with metal shafts as well.

A separate fist is included for the Hell and Heaven pose.

A variety of joint parts are included.

Among these, the smaller joint parts are used when detaching the arm to recreate the Broken Magnum.

GaoGaiGar's limb articulation is about average.
Pretty decent considering how complex the transformation gimmick is.

You can bend the knee a bit more by pulling the caterpillar track slightly outward.

The helmet and Stealth Gao are connected by a lead wire,
so the neck can still rotate even with the helmet on.

The two center sections of the mane can fold inward to give the arms a bit more range of motion.
It's an especially essential gimmick for the Hell and Heaven pose where both hands come together.

The ankle pivot is positioned on the inner side rather than the center,
which makes the ankles feel quite flexible.
On top of that, the feet are large, so the ground contact feels really solid.

On top of that, the wrist rotation gimmick for the thumb is stiff,
so when you try to spread the thumb out to the side, it ends up pushing the back-of-hand parts off instead.
This causes the hand back to pop off way too often — so I just went ahead and glued it down with bond. (Much better that way..)

Together with the SDCS GaoGaiGar.

Together with the HG Gosaurer.
The quality gap between HG and RG is enormous.

Next to the MG RX-78-2 for size comparison.
It's pretty much MG-sized.

Together with Kotobukiya's Great Exkaiser.
The beginning and end of the Brave series, all in one place.
Their head heights are pretty similar — feels like they deliberately matched the scale..?