This one came late as the last core class in the serie. The reason for this is they waited to see the updated 3.5 ranger as it is one of the most heavily reformed class. Anyway, I found this to be an excellent entry in the serie considered by many to be the flagship of Mongoose Publishing. The character concepts are fresh and innovative while being balanced.
I thought about giving it a 4 star rating, but I had to compensate for the overly critical previous reviewer. I don't know of which missing feats he mentionned. It's true several feats refered to are contained in the D&D Player's Handbook, but this is no news. It is implied that this is a supplement to the Core Rulebooks from Wizards of the Coast.
If you love Rangers as I do, you won't regret the money spent.
Good reading and happy gaming !