I finally purchased and installed the Pacesetter Monza Performance exhaust on my MIata and I have to say that I was very pleasantly surprised at the purchase and the value. The body of the catback is a sleek black with very nicely welded seams and the metal looks like it will last for longer than a couple of years (though not as long as a Stainless Steel muffler would).
It goes together relatively well and is quite easy to put on the car. The only problem I had was with the U clamp that came with the catback was too small and I needed a new one.
As for the sound, I like thr growl. The old (OEM) muffler was already loud from rust, but this muffler has a low throat on low revs and screams on high revs. I was suprised at the increased throatiness of the engine on addition of the catback and performance was definitely increased, more so than any other performance enhancement on my car. I would definitely suggest this catback.
As for the price, the quality of the product and the final outcome, I would have to say that this is a good purchase for about $170 and a weekend in the garage.