I got this thinking it would be like the only other game guide i've ever bought which was for a final fantasy game - it was full of maps with item locations, clear instructions, boss tips - the works.
This item is not like that. It does contain full class breakdowns and tips on what attributes to boost to produce a Shepard that suits your play style, which I'll admit are kind've handy, but it's level guides are pretty pointless since where you can and cannot go a pretty clear and any items are usually in pretty clear view anyway. It lets you know if any conversations will yeild paragon/renegade points (which is, coincidentally, most of them) but realisticly doesn't really tell you anything that playing the game won't. The multiplayer section also, whislt showing you the maps, does not show likely spawn points or objectives, and nor is there any kind of clear weapons guide.
Personally, i've used it about three times, by which I mean, it has been open on my sofa and ignored whilst I just got on and played.