It does its job perfectly fine, as other buyers have mentioned. The lamp with the adapter might protrude, but it doesn't bother us!

Finally, I found the solution!!! I bought 5 to have :)

It was exactly what I needed to replace the E14 bulbs which not only have much fewer but also provide less light. Especially if you live in a rented house and don't want to go through the process of changing the entire socket, you just put this in and you're done.

And even if you connect it to a smart bulb, you won't have any problem.

It does what it promises, I bought 5 "pieces" to use them in Xiaomi smart bulbs, and they all worked without any problem.
Also, very good build quality.

Although I didn't have much regard for these adapters, they turned out to be very good. The plastic is of good quality and appears "sturdy," while the bulbs that are placed inside fit correctly and without any looseness, unlike some other adapters. In the one and a half months that I have had them, they have not shown the slightest issue.