Didn't work at all when I was in Europe. ...
349507
Didn't work at all when I was in Europe.  Even my electronics with a built in converter weren't able to be plugged into it to charge.
2943368
Worked great in Europe!  I didn't know it came with its own adapter (I guess I didn't read that in the product info), so that was a bonus, and I didn't even need the adapter set I'd bought to go with it.  I don't know if I used it correctly, but I put it on the high setting for my hair dryer and the low setting for small electronics (camera, phone, etc), and it worked like a charm.  Will be ordering another one before my next Europe trip so I can charge more than one thing at a time.
937750
When in Italy, I tried to use the Garmin Card which I purchased for my trip to Italy. The item did not work. It recognized one address and then just kept giving me the notice of "item not found". I had to return to the car rental office and rent a garmin from them. The card was totally useless.
3337384
I bought this specifically for France. Although the product title is "OREI 3.4A 2 USB Schuko Travel Adapter Plug with for Grounded Type E/F Germany, France & More," this did NOT work in France. The prongs are slightly the wrong size. Not only did this not work on my trip, but I don't see an option online to return it.

Also, you cannot tell from the photo online because it shows only one side of the product, but the USB version is ONLY a USB version. If you want to plug in something other than a USB, you'll need to carry another adapter with you. I thought there would be an ordinary two-hole option on the side that isn't shown in the photo, but there is not.
960363
Took this on my trip to Europe and it was no good... the connection was not reliable- I ended up having to put pressure on it a certain way in order for it to charge.  I recommend a different adapter, spend a few extra bucks for something more solid and reliable... not fun to have to worry about an uncharged camera/phone.
112172
Based on the reviews and it appeared this product was going to be perfect for my European vacation. A plug that allowed for 2 usb ports was perfect for my phone and other mobile device. However, it did not turn out to be that way. The first time it was plugged into an outlet in Paris it started to burn out. The third night my phone did not charge after I did not use it for a day to give it a break. The fifth night the plug was stuck in an outlet in London while trying to charge my phone. Please note, I tried giving the adapter a break from not using it too much during my stay even when I needed too. Unfortunately, this one did not live up to it's reviews.
2815877
Unfortunately the item in question cannot be used in Europe as both electrical rating and colour system do not work on this side of the globe.  In fact I returned the product to Amazon.  Inversely I must say that I am very happy with the way Amazon handled my return of the item.  Thanks indeed.
629928
This doesn't work abroad USA. For me, this device wasn't useful.
940185
Took unit to europe and couldn't get it out of demo mode.  Came back to states and still not having any luck.  Called tech suport and no help  This was a waste of money.
677635
blew up in europe

this charger worked great in the usofa...  in europe...it blew a fuse/circuitry and died...  all my other usofa 240v compatable chargers worked fine over there...so...i know there was not a problem with 240 power...
1613209
I took this to England,France and Germany. The first week in England was super difficult because the adapter plug did not fit/work at all! The European adaptor plug fit/worked perfectly. I didn't get a chance to try the China plug. I'm very surprised about the good reviews. After using it at home a few times it died! Not worth the $20 I paid
2112621
This product worked in Europe to charge anything with a USB cable, but I was unable to plug in any US plug (I.e. Blow dryer, curling iron). I would not have bought the product had its uses been made more clear.
2272240
Doesnt work outside of the US and doesnt give you an option for refund! Happened to me twice, total bs
3121884
They must have sent me a european plug in...  On a good note I have plug ins that worked..
2569630
Couldn't make it work as advertised. Tech support is worthless, not in the U.S.
564133
worked ok in Sardinia and Rome, but failed completely in Florence and Siena. Did not work where US carrier AT&T was able to provide service, so clearly UK THREE does not pay for roaming fees to other carriers.
1238354
stopped working after five minutes of use!
bit of a shame...
leaving the US today so can't send it back