As an electrician I kinda cringe at tape around wire nuts, wire nuts should have spring pressure on the wires to hold them together, its not just a cap, it's bad practice to have tape around them. Also we tend to put switches and dimmers on the hot side (smooth side) as general practice, just so when the switch/dimmer is off, there is no potential at the device. Electrically however it doesn't matter.
Besides that, very inexpensive but professional looking dimmer. Very nice sir.