Robot 3D model

Man, I hate to give a bad review, but I feel like I need to warn others off from buying this model unless you are using the native format. I am not. The OBJ is smooth and a single object, but there are texture issues (for example the helmet and glass have the same material zone, so they cannot be given 2 different materials, which you need so that you can see the eyes). The FBX is in a lower resolution, made of MANY tiny pieces and (though the model is marked as rigged) it does not include a rig. I tried reaching out to the creator and he did not respond. I also reached out to CG Trader support and they said: "This model also has a non-standard rig, the designer users dummies/hierarchy instead of bones, and these cannot be transferred to exchange formats. Please note that you have indicated the issues that are only seen in the exchange format and this is not related to the model quality but is caused by the exchange format limitations. Please check for more information about the Exchange formats here." So, at least for me, the model is not usable. Again, I hate leaving a bad review, but neither the author nor CG trader want to stand behind this product, so there it is. Bummer. Lots of other great models here though.