I was very pleased with this necklace, and it made an impressive-looking gift. It has a real elegance, sits well, and is equally suited to being an everyday or more special piece. The two-hearts-as-butterfly idea gives it real personality, but in a delightfully understated way. My girlfriend is extremely proud of it, and her friends very complimentary (immediately assuming it had cost a great deal more than it actually did, as another reviewer suggested). In fact, this is now her favourite item of jewellery.
The chain feels secure without being too bulky, and the length can be slightly adjusted. (Full length was just slightly too long for my girlfriend, your mileage may vary). Be aware that the hearts are not fixed in place, but are free to move against each other. This means they will not always form the perfect butterfly shape shown. That should not be a problem.
The chain has actually broken once (in two years), but seeing as that was at the paws of a playful cat it can definitely be forgiven. It has needed no other attention, despite almost daily use, and the clasp is very easy to use (but secure).
Thoroughly recommended, whatever your taste.