This book is a mixture of different belief systems. It does have the typical Wiccan circle casting and "creed", but I have found it to be extremely useful with runic systems, ogham, divination, and other such things. I've been using it as a resource for what colors of candles to use with my craft.
While there are Wiccan aspects to it, I find it great. I skip over the stuff that I know is utter crap and use the things that I know to be true.
I'll give it a 4 out of 5. There are things that could be better explained in the tables (for example a planetary charting table had a formula that was rather confusing). Herbs, colors, stones, and other such things listed are very accurate. There are several things in there about Yule, of which is coming up and I'm looking forward to.