When I saw this I knew my mom would love it. it's totally unique. I was worried because some of the reviews make it sound like garbage.
This is not my impression at all.

The item has a good weight to it. My only complaint is because it's top heavy it tilts forward.

When it arrived we had to take the chain off to get the stones in. So I don't see how the stones can "fall out" because the chain keeps the locket closed. It appears to me the locket is designed to hold 3-6 stones.

After I helped her put the stones in (which took a delicate touch) she put it on and has been wearing it since. No problems. She just loves it. It's elegant but casual enough for everyday.