There is not much to say about the eyepieces that come with the telescope. They have 6.3mm(143x), 9mm(100x), and 26mm(34.6) apertures. They span the magnification potential of the telescope, but low-quality. This is to be expected at this price. Naturally, if you get better eyepieces, you get better images.
The red dot finder is a simple, budget accessory that reflects a dot in the sky when looked through. It works properly.
The Barlow lens that comes with the telescope is a waste of money. It is only usable with the 26mm eyepiece, and it lowers the image quality. I don’t know why Meade decided to include a Barlow.