Nothing particularly wrong with the product. Disappointed that the website allows you to select APO/FPO for a shipping address, but then I was later contacted and informed they cannot ship to APO/FPO and they would need a physical address. When I provided my physical address in Europe, it was at that point they explained they could only ship to the US. The only reason I ordered from Bulletproof Zone was because AR500 would not allow me to select APO/FPO address. I was lucky to find a friend who offered to receive the product and ship to me later. Update: Bulletproof Zone reached out to me. I appreciate their effort in trying to correct this. They told me they will update the site to avoid any confusion in the future. Although I may not order anything else while I am overseas, I believe they mean well and definitely put in the effort to correct any inefficiencies in their systems.