The design is a poorly done Bird-Jones. Any intermediate astronomer would close the article at this point but if you are a beginner let me explain shortly.
A Bird-Jones design uses a “corrector lens”. If done properly, it provides incredible results. Orion StarMax 90 is an example of a well-built Bird-Jones model.
PowerSeeker 127 is definitely not properly built. The corrector lens is inside the focuser is rarely aligned because of it. It also makes collimation a frustrating process.
You will get a lot of color inaccuracies and image defects if you get this telescope.
If you want a proper telescope that provides incredible images in this price range, go for Meade Polaris 130EQ. It is very similar to this telescope but in contrast has a Parabolic Primary Mirror, which is harder to manufacture but gives much better images.
By the way, don’t buy the Polaris 127. It is essentially the same as this telescope.