It says it won't do "milling working" on metals, but if all you want to do is "surface working" it might be adequate. What spindle is supposed to fit in that bracket they supply? For over $800, I think you can do better ordering your own parts; this is just a kit, after all, not an assembled machine. The ball screws, for example, can be found here for $26: https://www.banggood.com/400mm-Ball-...p-1018725.html . The slides are also available elsewhere for not too much: https://www.amazon.com/dp/B00QTFBXCE?psc=1 (although profile rails would work much better). Aside from that, what are you getting? Some pieces of aluminum extrusion and the gantry sides, it looks like. The shipping is confusing too - if they really are stocked in US warehouses as they claim, charging $189.47 to get it to you here seems a bit high. But hey, at least you won't have to deal with "backflash"...