I picked up the all metal one as part of a lot from eBay. This dude is HEAVY. It was a PITA to assemble too. The metal parts didn't mesh together right and left some horrible gaps. Here's a couple WIP shots.
Thought I had better shots of all the green stuff I used, but I can't find 'em. Basically, there is a giant gap between his right and left side torso and where the head joins to the body. Those had to be filled totally and sanded smooth. The actual painting part was rather easy. He's pretty much just an exercise in drybrushing and highlighting. Not too difficult overall.
I've been using him in game with Ragnar so far and he's worked out pretty well. His Transmute ability gives him pluses to DEF, ARM or SPD depending on the terrain he's near. With the Axer's animus he can get up to a 9 spd. That's pretty good for a lumbering troll. His fists are only one point lower than the Mauler and for that he gets shoved to the side and forgotten for some reason. He's the same price, has a great animus and can be boosted in STR to 21. He's also immune to all typed damage. I think he's a pretty good beast and plan on using him for a while, especially since the internet seems to hate him for some reason.