I have never tried any type of powerlifting program,but I have been researching Westside for the past 6 months. I wasn't able to lift for almost 2 months due to surgery, and I decided to try Westside to recover my lost strength when I was allowed to lift again.
I've got to say the results were phenomenal. It took me roughly 2 weeks to recover to my pre-surgery lifts (probably not that phenomenal), and I went uphill for the next 2 weeks. More than that, I burned through pretty much all the fat I had put on those 2 months I had to take off, even though I was only eating semi-clean (250g protein, between 3000-4000 cals a day, other than that I didn't care). This might not be that surprising, either though, with the intensity the workouts take.
Anyway, I was very happy with the program, I'll probably keep it up for another 4 weeks and then transition into something else.
I'll come back to it as often as possible, though.