As I almost passed all the story-line missions, I looked at my stats and realized that I only completed 43% of the game. I realized that there were some rampages and races that I didn't complete, but I still knew that I missed a lot of game here! I bought this guide and it made me realized that there are side missions out there that I didn't even knew existed like "Avenging Angels" or "See the Sight Before Your Flight" side missions.
This is a huge 225-page guide full of stats, maps and pictures that give you how-to-walkthrough of every mission. There is also a vehicle "showroom" section that shows you every single vehicle in the game, including vehicle's speed and handling score. The same is done for weapons sections.
This guide includes every nook and crany; however, if you are an expert, you may not need a lot of stuff that is in there. For example, it tells you what exactly going one during wanted levels(1-star is where one cop chases you...and 6-star is where the military takes over, etc.) If you're an expert, you may not need that information, but its still nice to know its there, as this guide is for a GTA expert and GTA newbie alike.
Also, I did find some misc. errors in the guide. On a map where the parked vehicles are shown, it states that Deimos SP is parked on the Cedar Grove highway, when in fact, its Phobos VT that is parked there. I'm sure there are a few minor errors here and there, but its hard to penalize the overall score based on that because the positives heavily outweight the negaives.
The final 50 pages of the guide are a MUST for anyone who wants to beat the game 100%. It gives you details of all the side missions, as well as, a full-page map, which shows you where every rampage and hidden package is located. Also, shows you where every weapon and police bribe is located as well as payphones where you have contacts calling you for street races.
Bottom Line: There are websites out there which will tell you how to beat the game, so you may not want to buy this game for walkthrough alone. However, if you want to 100% complete this game, this is a must, especially it being a $10 bargain.