I used these as an American living in Australia for four years, and had no issues with them. They just worked. I like that they have both triple-prong (with ground) and two-prong outlets on each one, as I was able to plug a phone charger into the two-prong outlet on the one I was using for my computer and double up. Obviously make sure whatever electronics you're planning on plugging in work with the current you're plugging into, but for a lot of items in this day and age that's no longer a problem; from the US I brought my computer, a phone charger, and an electric shaver and all three worked fine.