Just a quick review about the contents and packaging etc. Most people will probably go to the listings of each individual game for a review of gameplay and story.
The box comes inside a cardboard sleeve which protects it well and is quite sturdy. The lithographs come in a large envelope and are amazingly detailed. Definitely a great collectors item! There are 2 compartments inside the box, one holds all of the Downloadable content and manuals, and one holds the steelbook. All of the games use codes for the content, except for number 1 which doesn't have any, and number 2 which has it on the disc.
The price has fluctuated a lot recently on Amazon. I managed to get the collection for around £45, but I would say that if you can find it under £60, and are unsure, you should definitely buy it. To buy AC3 and the season pass alone would cost around £35-£45. I spent some time roughly estimating the price that all of the content would be if bought separately on Xbox live and it comes to around £75, and that is obviously without the games themselves!
There isn't really much else to say. I justify giving the 5 star rating because I have played all of the games and on the whole enjoy the series thoroughly, but like I said earlier, I'm not going to go into detail about every game because that can be found on individual listings for the games.
I hope this review has helped anyone who is confused/unsure about this collection!