I bought it thinking it'd be a vast collection of one-liners, but in fact, the solutions seem to average about a page each. But still, I wouldn't be without it now. It's well organised, and I personally find that it's index is pretty close to perfect, head and shoulders over most IT books (I'd say the same about other OI'Reilly books, though - perhaps the other reviewer wants other things from an index?).
The solutions I found most handy are things that tell you how to, say, parse comma delimited stuff, or do certain things to HTML files and URLs.
I found the section on validating email addresses to be one of the best I've found, and it backed me up very well when a client told me that I had to completely validate them.
It is not as readable as the camel book ("Programming Perl"), but fills a complimentary niche.
Basically, if you use perl regularly for many varied tasks, then you probably need this or you will be reinventing the wheel far too often. You'll probably get back the cover price as time saved the very first time you refer to it.