The adaptors work fine, but the bayonet socket leaves the bulbs pretty wobbly. It doesn't seem to affect the function, but it's going to be unsightly if used somewhere visible. I bought them so I could use the bayonet based Hue bulbs I already had when I moved in to a place with Edison fittings in the existing oyster lights. For my use they were fine.
Absolutely brilliant product. We had lights that were inset into the ceiling & couldn't see a thing. We bought these & put extensions in them & now have fantastic lighting throughout. They let us change from screw to bayonet.