Jump Plus manga encompasses a wide spectrum. Whether a manga is seinen within Jump Plus depends on its specific content and intended readership. There's no strict rule that everything on Jump Plus is of the seinen category.
Sure, Manga Plus by Shueisha is legal. It operates within the framework of copyright laws and partnerships with the creators and publishers to bring manga to fans in a lawful manner.
Sure, Manga Plus is a legitimate option. It provides a legitimate and quality manga reading experience. You don't have to worry about any illegal or unethical aspects when using it.
Manga Plus is an online platform for manga lovers. It stands out from others due to factors such as the quality of scans, user interface, or maybe the community interaction it enables. Different people have different preferences when it comes to manga platforms, and Manga Plus has its own pros and cons compared to the rest.