Well with the infamous clear plastic breakages of Funkos' Legacy figures, I had to do a post of this.
The areas highlighted here are the only trouble I've had with my Goliath figures but they're still noteworthy.
The first on the left is the shoulders. Of both my Goliaths, only 1 can raise one arm (his left arm) at the level you see in the image which is about 70 or so degrees. They are incredibly stiff and various techniques like hot water, the freezer trick and even using washing up liquid to loosen them didn't work. You're pretty much stuck to rotation and a tiny bit of up and down wiggle.
(If anyone finds a solution, please post!)
The upper legs have a thigh swivel but rather than turning like they should, the plastic just twisted and broke/tore apart so those areas are now useless. Funnily this only happened on both of the right legs. The left were fine but I broke them purposely rather than have them break in future so I could fix them all now.
I just glued them back on with super glue and added some around the outside seams as well to hold them all together.
So only shoulder rotation and super easily breakable thigh swivels.
Not a good start Funko but all the other leg joints swivel and hinge so the thigh loss isn't that big at all.