If you work in the world of therapy/psychology (as I do) or you are just interested in it, I believe you will like this book so long as you are not anti-psychoanalytical/psychodynamic (as that is the authors orientation), however, in saying that, the author is so good at relaying otherwise complex information (psychodynamic literature can be full of complex jargon for the uninitiated) and does not preach his school of therapy at all, making this read is accessible to all.
Obviously aimed for the therapist, it can be handy for ideas when formulating cases as typical presentations are detailed (of 'the depressive', 'the obsessive', and so on) with common characteristic and personality themes derived from theory and the authors practice. There is a really interesting chapter too on the characteristics of the typical therapist - had me down to a tee. I found the very early chapters on the practicalities of therapy a bit too basic for me.
I would not recommend it to someone who is well versed in the school of psychodynamic, as you may find it tedious, but for training therapists, or therapists/psychologists with an open-mind (not a dogmatic CBT type for example), an interest in personality development, or a hint (or ineed more) of an interest in psychodynamoc approaches. Should be cheap-ish too as it is a tad dated. I actually read it out of interest, not so much for work, as it is enjoyable and not a hard read (and then read bits of it again) :)