In the past year, many many expensive cameras have been stolen in Saigon. I have also read of this type of thing happening in Nha Trang as well. I personally like Hanoi much more, and have never had any problems of this kind up there. I've been to Vietnam 4 times, and am planning a 5th trip later this year. Vietnam is a great place, but like any developing nation, it does have it's own set of growing problems.