This book is a facsimile version, which appeals to my sense of history; although it has a drawback: in places bits of letters have gone missing and it can impede reading ease and comprehension. Kind of like both sides of a coin I guess, so I present this as a fact, not a criticism.
The real challenge is that it isn't helping me learn maths, I see no evidence of it being like a tutorial or textbook. It reads much more like a reference for people who have a very good understanding of the maths in it already. I'm very interested in understanding what it says, and it's going to take additional help.
All up, I think it's a treasure in the historical sense as a time capsule of science, it's an economical price and looks as though it's made to last as a book.