Pros:

- Looks nice

- Fits both A19 and A21 LED bulbs

- works well in table & floor lamps as well as ceiling sockets

- is short enough to work with IKEA floor lamps



Cons:

- Fragile: you need to hold each socket and make sure to not overtighten the bulbs. Each bulb socket is held in place with two plastic tabs

- One of the four splitters I ordered arrived with one of the bulb sockets broken (one of the two plastic tabs holding it failed). Box was not damaged.

- Bulb contacts bend when you screw in a bulb, so if you put in an A19 bulb and then try to replace it with A21, the A21 may not work because the A21 sits higher than A19 in the socket and A19 (or a thinner bulb) has bent the contact



Overall, a great looking and functioning bulb splitter that's relatively compact. That said, be careful handling these and only put in bulbs you intend to use. I took off a star because it's pretty fragile, but then again it's not a wrench you crank on, so should work very well indefinitely as long as you hold each socket when putting in/taking out a bulb and don't overtighten the bulb. I put in two A21 and two A19 LED bulbs in each of these and it made for a cool effect.