About 5 years ago now, I had started to get into TTRPGs through 5e, and I have recently started to explore and look into the older editions and OSRs as a GM from the beginning of my RPG career in the past couple of years or so (need to always broaden the horizons of what one knows and what one can offer); and I have found a few that I've liked. This is clearly one of them, and in my personal pages of history and opinion, this is in my top 10 OSRs: rate up there with Basic Fantasy RPG, Lamentations of the Flame Princess, Swords & Wizardry, Stars Without Number, and etc. That is where I personally rank it. And as another had said, it seems to be clearly a labor of love. So I went ahead and bought the hardcover premium color version because I support it, and I also work better with a hard copy of a book in my hands to quickly leaf through the pages when necessary; while also wanting it to last through the ages for as long as possible. I do believe, however, a downloadable pdf for the character sheet should be made available separately; so as to print them off if need be and hand them out to players, or fill them out on pc for games being run online. It would be a great help if it wouldn't be too much trouble. Other than that, I give this OSR a 5/5 stars from this GM (10/10 if I could), for reconstruction and recompilation of the 2e rules in a single volume. A work of art and a job well done.
Edit: A stand alone separate character sheet has now been made available. Great customer support. For a response as quick as this to something that could have easily been ignored, to something as simple as a character sheet, another 5/5 stars from me. Nothing ever gets any bigger than the little things in life, and those are the things that matter most. And to those wishing for a module that they could have to go along with this, I would say to be patient and I'm sure one will be along the way soon enough, just as they said it would be.