No problems with my flat iron in Czech Republic, Austria and Greece.This adapter worked great. The only problem we had was that there were several hotel power plugs that were located either near the floor or close to the top of the nightstand. The USB ports on the bottom were blocked, and we couldn’t use them in those configurations which were surprisingly many in our hotels in New Zealand. If this could swivel 90 degrees one way or the other, it would have completely solve that problem. Otherwise, it worked perfectly when we could use it.used in Europe for 2 weeks. Very versatile. Powered phone, ipad and watch quickly!Was travelling and needed a universal adapter. This was perfect for what I needed. It powered everything that I needed. Never had an issue with anything I plugged into it. Wish these universal adapters were smaller, but don't think there are any much smaller. I really enjoyed mine when I was travelling through Europe!I recently bought this adapter for my trip to France. Worked flawlessly and I love the USB-C slot.The perfect travel charger. Multiple USB ports for multiple devices and plenty of charging power. The multiple plugs work just about everywhere in the world.Amazing ProductIt offers a lot of options for charging, and the USB-C superfast charging is nice, but this new unit completely stopped working after a few days in Europe. A second identical charger lasted almost 2 whole weeks before going off to the big power outlet in the sky. If you buy one, don't get too emotionally attached.