The red dot finder is the simplest finder you can get. It just provides a red dot on a screen. It is easy to use and reliable.
The diagonal that comes with the scope is an amici. Amici diagonals lower the image quality by creating a spike in the middle and adding blur, but better diagonals are pretty expensive. So it gets a pass.
Apart from the 2x Barlow, the accessories are pretty good. There isn’t a single accessory that drives the price up for no reason apart from the Barlow, and both of the eyepieces have a specific use. The finder is useful, and the diagonal works adequately.