It is. I have paid sense 1999 when it was The Langa Report. Then he went with Window Secrets. The archives (second link) has many windows hints of value. I think one can get it free if they put in their e-mail.
I needed this with M$ Windows 98 SE. I crashed it about 6-10 times. I got so good at re-install it took about 45 minutes with all my utilities. My first Windows XP Home Oct 13, when it was released (forgot the year) again it helped a lot to find ways to work around and do page file and registery work. plus crashed that one about 5 times.
Have ink in the printer... lol
I printed out about 200 pages in these years. I have a folder named Window Tips that is about 1 and a half inches in size.

This XP Home hasn't crashed once yet. But the blue screen of death has appeared several times. I learned enought to get it up and running quickly.