Seems odd to have one official controller on the right and a mock-up on the left, especially considering the buttons and joy-stick probably feel quite different than the official one.
The stick is nearly indistinguishable from the one on the official joycon. The L/R buttons are a bit more raised (and feel better to press), but it basically looks like it could be an official Nintendo product. It certainly doesn't look or feel out of place when using it with a regular right joycon.