Sebastian Raschka's website is a personal blog and professional portfolio for a well-known AI researcher and author. Unlike many sites that try to hide who runs them, this one puts the operator front and center — full name, PhD, career history, and multiple ways to verify his identity. The domain has been around since 2013, with no history of abuse or security incidents. For a site that exists to share articles, book information, and course materials, that's exactly what you want to see.
The one thing worth noting is that the site still allows visitors to connect using very old encryption standards that modern browsers have stopped supporting. It's not a practical problem for reading the content, but it does mean the site hasn't been fully updated on the security front. If you're just browsing, that's fine. If you were considering subscribing to a newsletter or sending personal information, you might want to check that the signup form is served over a secure connection (the site does use HTTPS overall).
Overall, sebastianraschka.com reviews are straightforward: it's the legitimate online home of a known academic and author. There's no evidence of scams, fake offers, or shady behavior. The site does what it says — provides information about Sebastian Raschka's work and publications.