I just got back with Sentinel, but I picked up an international version. Since I live in Canada, (I live in an area with Mulitple races and languages) it was meant to be sold to mulitple languages. I discovered that the international version has different sounds when using the MechTech weapon. When plugged in, Sentinel will make more firing sounds instead of saying "What has happened to the Allspark?" or "Good to see you alive, Optimus". Also, he just says "Sentinel Prime" as the default speech. Just a hint to others who may come across a international version. Oh and the toy itself? EPIC!!!