I finally got around to assembling mine last night (have been building a workshop which is keeping me busy). This unit certainly has some heft to it, that's for sure. It went together quite easily, no issues there. I can't make comparisons to the Festool MFS having never seen one.
I do wonder why Woodpeckers didn't engrave the top of the rail in metric, the bottom in imperial so all you'd need to do to switch from one to the other is turn it over. The design requires it to be taken apart and reassembled which is no huge deal. It's easy enough to do and not a task I'd often be doing.
Unsure when I'll actually get to use this, but it's in my arsenal of Woodpeckers gear.
-Dom