I have purchased and installed several of these. All have worked. I bought some white and some yellow depending on what they connected with.
Punched down easily. I highly recommend using a puck under it as you punch.

These work good as a standard phone jack in my house (for use with keystone wall plates)

While this jack seems to be of good quality, the large physical size limits the number of jacks that may be placed in a faceplate.

Used these at a startup from scratch dental office. Images and color were great. works well and so happy! easy to do after watching 1-2 you tube videos to make sure i learn how to punch down well.

I thought I would get a real 6P6C RJ12 jack for some house phone lines. In spite of the text description and the picture in the product listing, what I received is a flimsy 8pin cat3 rj45 jack. As other reviews say, it is huge -- 23mm wide, compared to the 18mm width of the cat6 jack #5384.
I would return the 3 of them if it wouldn't cost much to ship them back. Very disappointed.

These jacks were exactly as expected and worked greate for my phone install.

Too wide to fit in the wall plates side by side. It's actually wider than the first set of phone jacks I bought.

How is it possible that I can get RJ45 side by side and not RJ11 or RJ12?

Not a bad part for the price. The "white" jacks I ordered compared to the 5e jacks and the plates I ordered and not exactly white, more of a creme color. Also a couple of these had issues where the wire would not stick in the metal spline but instead slumped over it causing a null connection on that pin. This could be a function of the jack or my punch down tool.

This jack is too wide/high to fit in keystone plate with 3+ holes. Punching then down is really difficult as the pin inside are loose. You have to carefully punch them slowly, making sure the cable is sitting really straight. Doesn't fit in a conventional puck either.

They are cheap but there is a reason.

Still managed to get all of them working but it was a pain.

Poor design and cheap engineering prevent these from working in standard keystone plates. Save your money and buy elsewhere.