Opinion: Yes.
I have some very minor issues with it but they'd need spoiler tags. My problem is certain items in the index are not correctly indexed. It points you to a handful of pages, but those pages only *mention* the item in question and they tell you nothing about where it is found.
I've also found it to be very good table reading. That is, in a room with lots of porcelain and no actual... tables.
It doesn't exactly give you strategies on how to beat some of the creatures (Dragon Priests, anybody?) but it does give you recommended levels for areas. And, of course, it gives you maps.
I like a physical book better than a wiki.