I bought a few packs of these a while back to make a knight army, as the others have said the plastic is fairly soft but it's workable. The only issues I've had is with trying to file down compononents where the plastic just sort of bunches up in balls and strings but the end result is the same.
I've taken a few quick snaps to show scale but if you want anything more detailed just let me know

The middle bot is designed to have a horizontal carapace and chicken like legs which I've attached which may make it appear slightly bulkier. I think what I'll end up doing is taking this carapce and turning it into some sort of drop ship with vectored engines.

From left to right. FW reaver, baron conversion, castlelan conversion, paladin conversion, stompa.

A better view of the detail on the models which isn't terrible but as you can see I haven't tried painting anthing yet.