Personally, we've talked to a range of Apple Watch owners and have found people who love it and people who bought it and then shoved it in a drawer. One of the biggest factors is expectations.
If you're looking for a smartphone replacement, the Apple Watch is not for you. In fact, no smartwatch really is. It's also not for serious fitness enthusiasts. However, it does work well for seeing what notifications are important and which ones aren't, or making the occasional Siri command.
Either way, an Apple Watch, or any smartwatch, isn't really a gift you want to buy FOR someone. It takes a certain kind of person to actually find a smartwatch useful, so it's better if they buy it for themselves.
At the least, they should have told you clearly that it's what they want, and the exact model. Just like a smartphone, computer or other tech gadget, the specs matter. You don't want to spend hundreds on the wrong thing.
Do you have an Apple Watch? Let us know your experience in the comments and whether or not you found it as useful as you'd hoped.