I'll believe it when I see it. Personally, with the "200MW fusion generator on the back of a truck" I think they're making some VERY dubious claims. Regardless of the scale of the heat source, a steam turbine-based 200MW generator has some unavoidable requirements. If I've calculated correctly, you're talking on the order of 500 kg per minute in the steam cycle, with turbines big enough to expand it from a few hundred atmospheres down to ambient, and a comparable flow of cooling water. Such a cycle may be many things, but "compact" ain't one of them.
Think about a conventional fission power plant. The actual reactor core is extremely compact, yet the plant itself is enormous. Fusion doesn't magically change that.
