Silver Star is very much a "phoned in" effort by Kirby, an attempt to make a little more cash towards the end of a brilliant but largely unprofitable career, without much concern for care and quality. Norma Richmond's face frequently and spontaneously turns into the shape of a football as her breasts explode and jut out to the sides, only to have both return to normal proportions a panel later, a key character who dominates the first half of the first issue is completely forgotten by the third, and the dialogue is horrendously stilted and corny...even by Kirby standards.
Still, the one quality that stands out as being worthwhile in this volume is the villain. This should be no surprise as Kirby has always been the king of arch villains, frequently making them even more appealing than his heroes. How many of us are bigger fans of Doctor Doom than Reed Richards, Galactus than Silver Surfer, Darkseid than Orion? Indeed, the mad and religiously fervent demigod Darius Drumm is a fascinating speciman, and Kirby clearly understands that, giving him the center stage in this series. For, even though it's called "Silver Star," we learn more about Drumm's origin than Silver Star's, spend far more time analyzing his psychology and world views while SS is just a goodie goodie trying to stop him, and even the climax of the series, though involving SS from the sidelines, is more about Drumm standing in the way of himself. Drumm is the star of this series and the one quality that makes it worth reading.
Unfortunately, in contrast, Silver Star is a dull and relatively useless hero, bringing no personality to the story and repeatedly failing to save literally millions of lives while only managing to protect the three people closest to him. In all the Kirby classics, even while the villain stole the spotlight, he shared a special connection with the hero that somehow made the hero and his struggle more interesting. For Doom, it was his rivalry with Reed Richards and his hopeless love for Sue Storm. For Galactus, it was his reluctance to harm his formerly loyal servant. For Darkseid, his secret relationship to Orion was virtually all that made Orion an intriguing character.
Drumm and Silver Star bear uncanny resemblances to Darkseid and Orion, both visually and by the fact that they are both uber-powerful gods, even while the villain is hopelessly more powerful than the hero. Yet Darkseid and Orion share that secret relationship, and from that stems so much of the interpersonal drama of the series, so much of the investment in Orion's struggle. In contrast, Silver Star and Drumm have no deeper connection beyond the fact that they are both near-gods and SS is bent on stopping him. There's no buy-in for SS's character beyond the hopeless frustration he feels as he repeatedly fails to stop Drumm (though this borders on Kamandi-level whining).
In the end, there's a lot wrong with this volume, but if you can tolerate the hero long enough, the villain just might make the read worthwhile. And be sure to read Jack's original movie treatment from which this comic was derived at the end of the volume. Jack clearly put a lot more care into the would-be Silver Star movie than he did the comic. And Norma Richmond/Jayne Davidson, the invulnerable movie star who drives herself off of cliffs and straps herself to bombs, had serious pin-up potential.