His turnshoes are what finally drove me to make my own. I cut apart pair of his Reimerswaal Turnshoes. They were close but had some flaws I couldn't overlook. His turnshoe patterns are generally very good and documentable, his 'turnshoes' are actual turnshoes (in that they are turned properly).
The construction uses some shortcuts (heel stiffeners are glued in instead of stitched). There's no finishing on the raw edges unfortunately (high quality turnshoes will have leather piping over the raw edges around the opening). His turnshoes do give the impression of a proper medieval turnshoe upon first glance, so in that respect they're a step above something like the Westland boots that Viking Leathercraft sells.
My big complaint with them is that the soles on his turnshoes were all the super stiff, super-slippery hardened stuff that give period footwear a bad name, making them unusable for some applications where real period footwear shines. That was what finally made me learn how to produce good period footwear.
**It's important to note only his turnshoe styles use the bad soles. His other styles like the Jorvik boots offer modern soles. If his turnshoes had a soft leather sole like the historic examples they'd be an awesome commercial product, but until then I can't recommend his turnshoes**