The design of the Ankr-Max is similar to an open ended ankle boot with straps. With accoutrements and a lot of extras, one could perform a decent range of leg exercises bilaterally or unilaterally depending on your price point. I went for the single Ankr-Max with 1 in. plate adaptors and the heel plate adaptor.
A few notes:
I received the two vegan leather ankle pads without any instruction of how to attach them as they are in the website photos. They appear to have a "padded" side and a micro-velcro side, but no means to attach them to the ankle screw-ins. So basically they are just not attached and sitting on the side.
The boot and attachments appear to be made with a high grade plastic, but it's not something I would want to test deliberately or accidentally with dropping or impact for fear of deforming or cracking a component.
While the heel insert is adequately designed, it was a little challenging to secure in the slot and with it inserted, it is very awkward to strap in and then move into an exercise position. You sort of have to keep your foot elevated and swing it around to a secure start point for reps.
The straps are of decent quality with the metal clips, I am concerned about the longevity of their use under load. They are also fairly long and the extra slack tends to just dangle or flop around when performing sets. I understand the strap length is if you wanted to do Tibialis Anterior work at a different foot angle, but the design is a little awkward and unwieldy to get in and out efficiently.
I would like to see if there are resistance band attachments in the future.