I have three of these, and on two of them, the plastic and metal pieces separated. I superglued them back together and they've been fine since. The small size is great, and they fit the Siren v1 perfectly if you want something that won't look off on its slightly raised drip tip connection. The #10 white one looks fantastic if you can get one.
So yeah, they look good, they fit a tank that nothing else fits, they feel nice, but have some glue handy just in case.