The power of Pete Egoscue's method is that he's always thinking of the alignment of the whole body, not just the area that is hurting. Some of the e-cises may look familiar, but their power is in the choice of the particular exercises for the particular problem, the order of the exercises, paying attention to the details of how to do them. The whole works out as much more than the sum of the individual parts.
The only drawback is that, at the beginning, an e-cise menu will tend to take quite a bit of time, particularly the all-important supine groin stretch. But, after you've done the exercises for a bit, this stretch will take a lot less time. However, in many cases, you will feel a difference after even one go at his exercises - either with pain relief or a feeling of moving better, straighter and more freely.
I've used it successfully for hip and knee problems in the past and now need to start again because I've been lazy and not been thinking about sorting out pain etc which has crept up on me.
(The other book I'd strongly recommend for anyone with musculoskeletal pain is Clair Davies Trigger Point Therapy Workbook.)