One thing or I should say two things about these portable garages... definitely use all the parts and zip it up all the way around as each piece interlocks and makes a solid structure, as in don't just put the sides on or something like that...
Also try to protect it by putting it next to the house or garage or between the trees or something like that and not out in the wide open...
When these practices are not implemented I've heard stories such as "it was in the neighbor's yard" and "last I seen was when it was going over the telephone wires"....