I haven't done PS for a while, but it's a good, solid split workout, kind of like an early version of GS without the band work. I think the reps are a bit faster than in GS, though, so it's harder to go as heavy.
There are no premixes on the workout, but it is well chaptered.
It is a bit dated, as in headbands, but still a great workout.
The only thing it's missing, that Cathe started doing with later workouts, are rear shoulder exercises (I might be wrong about that one), and step-ups.
There may be some questionable exercises in it, IMO, like high upright rows, or barbell rows done with an extreme bend to the body (this last one is in Body Max, which came out around the same time as PS), but I don't remember it well enough to be sure.
As for "fun," I guess that's subjective. What I consider "fun" might not be what you look ofr as fun" in a weight workout. I enjoy workouts that are effective and make me feel strong. THAT makes it fun for me.