"Our anonymously purchased StarBlast had an acceptable if unremarkable paraboloidal primary mirror. The views it offered were light-years ahead of those we had three years ago throuch a 4 1/2-inch reflector with a spherical primary mirror.
That said, our StarBlast's primary wasn't a perfect paraboloid; bench tests showed alternating zones of under- and overcorrection (Another StarBlast anonymously purchased by a staff member for personal use proved to have a better mirror than our test scope.)
Under the stars, image quality held up quite well up to about 100x and at that magnification (obtained with an optional 9-mm Orion Sirius Plössl and a Celestron Ultima 2x Barlow lens) I was able to cleanly resolve the Cassini division within Saturn's ring system as well as several tightly spaced double stars (Gamma Leonis, Lambda Orionis, and Castor).
However, while the StarBlast delivered reasonably crisp medium-power views of Jupiter and Saturn, things softened up noticeably beyond 100x"