This is a nice design. I purchased it because my travelling companion had one on our last trip and it impressed me. While I had to rummage through my bag for the right adaptor (What was the point of the EU when the UK, Belgium, and Italy can’t even agree on a common plug??) she just changed the slide levers on this unit.
I have not traveled with it yet, but I have been using it here for some weeks now in the U.S. and it works well. The construction quality is good, and the slide-out prongs stay locked in position until you push the release button. I am quite pleased and I have already tossed my motley collection of country specific adaptors in the bin