Purchased this item to use on holiday, in swimming pool and sea, for general swimming - not diving. The watch was delivered ok and strap adjustment was fairly easy.
After about three days of use, the watch showed signs of condensation on the inside of the glass, this spread over the next few days.
I stopped wearing the watch to give it time to dry out. It is still working ok but is definitely not waterproof. In summary, it looks nice, works ok, is not waterproof but was only 15 quid. You get what you pay for!!!