This was a pretty entertaining (If kinda generic) manga. Not gonna spoil the ending, but let's just say that the plot twist came entirely out of nowhere. The way it all ended seems more like a rush job and, like Nivek's comment below me said, at time it really felt like a copy/spinoff of his other work 666 Satan. Seishi probably worked some of the leftover ideas he had from 666 Satan into this.
Honestly though, Blazer Drive's premise, setting, characters and plot (Up until that twist) makes me feel like this should've been a shounen instead. Blazer Drive screams "MEDIA FRANCHISE FOR KIDS" with the entire "Gotta catch 'em all!/Search for the most powerful sticker" vibe the manga gives off. It had tons of potential for that, but it being a seinen, along with the game flopping hard (According to VGChartz, it only sold approx. 10,000 copies) didn't garner it as much attention as it should've. Shame.