I have the book, and even though I don't play the lines, I can vouch for the quality of the book itself.
I think most of the negatives you'll hear about it have to do with how theoretically testing the lines in it really are against top level, booked up competition.
But as a practical choice, it will do more than fine. It's a typical Davies book. A little too optimistic, a little light on cutting edge analysis, but good with giving plans and guidance.
I wouldn't get the book and then start playing the lines. I'd give them a go first, then decide. I bought the book, but found the lines incredibly awkward OTB and abandoned them for more standard Be2 fare.
anyone have any experience with this? its a book called taming the sicilian by nigel davies which goes 1.e4 2.Nf3 3.d4 4.Nxd4 and 5.Nc3 and 6.g3 against almost all sicilians. its tempting for me to try out. i heard some bad comments on it on chesspublishing.com but the more i look at the book the more well thought out it looks. maybe its even possible to build it into a open sicilian repertoire later on by exchanging g3lines here and there with mainlines?