I have some. All my Night-Vipers and Toxo-Vipers are Funskool versions. I have a few non-army builders, most notably Spearhead because his Night Force figure is so hard to find (although I did repaint and re-accessorize it to look better).

The problem with Funskool is that more often than not, the paint jobs will be sloppy, the swivel arms will be problematic and the paint used for skin colors will not match the skin-colored plastic... Not to mention some figures get fully overhauled and end up looking bad.
Of course, I love the Funskool Big Brawler, it works so well for his loud over-the-top filecards! Just had to remove the "ARMY" on his chest and replace it with "BRAWLER".

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RIP Minouche, 1994-2009.