They are beautiful! Very vibrant and bright.
They are very quiet at lower speeds and are still not obnoxiously loud as higher speeds.
They work really well with a Razer ARGB controller really well except that the plug is too fat for the device... sounds crude but a little sandpaper makes installing much less stressful. There is a lot of wires, but that's what you get for ARGB PWM fans. A 10way fan splitter is a nice solution for powering them. And syncing them with the motherboard without overloading the board plug.
Considering getting three more but ain't got that kinda money... and it's excessive anyways!
As noted if I have any issues I will be sure to make that known.
Edit 1: I buckled and ordered 3 more