I primarily purchased the 1990s version for reference. But one day, I decided to try some of the recipes. Over time, I've tried nearly a dozen fairly unique ones (of older heritage I would say). Most were truly delicious. But - and this is a big consideration - I had to really read through several recipes before finding some that matched my interest and skill level. The recipes are not necessarily complete and connecting the dots may be required. For instance, termperature or time might be missing.
That said, it's fascinating to read. And it's really a go-to when you really want to go to that French definition of "old school."