/3/ - 3DCG

Are these courses just memes? I want to get better at hard-surface and topology to make aircraft, but wanted to get /3/'s opinion/input on it first, especially if anyone here has experience with these courses. Is there a best or worst among these? Are there better alternatives?

>Linda
https://www.lynda.com/Blender-tutorials/Welcome/606041/671483-4.html

>CGCookie
https://cgcookie.com/course/introduction-to-hard-surface-modeling

>CGMasters
https://cgmasters.net/training-courses/hard-surface-modeling-in-blender/

To me, the CGMasters and Linda tutorial seem like the best ones. I would like to eventually be able to retopologize stuff for real time use, but that's kind of a secondary thing, since I'm not much of a game developer. Being able to 3D print my stuff is more important to me.