I got mine yesterday. Paid Thursday evening and shipped the next morning.
I ordered 90 of the thickest and 110 of the thinner. Atm I'm using the thicker ones my Keycool 84 key with kalith browns. They feel nice, but perhaps dampen the keyboard a little bit too much for my taste. They remove most of the bottoming out sound which is the main source of noise with that keyboard. (I'm god awful at touchtyping/not bottoming out.)
I needed a keyboard to play games with during the night, and this fits well.
I haven't tried the red ones yet, I haven't made up my mind if I want to use them on my Filco TKL with browns or the fullsized Filco with reds. Leaning towards the reds atm.
Overall I had a great experience with the seller, despite Gollum being a creepy mofo.