I haven't heard any good things regarding their 2.5 exhaust system. Most complain of the fitment of the parts. I have not personally seen one of these systems, but believe what others have told me.
The Motorsports Auto setup is a little better. It seems to fit better, although it's a little more expensive.
Both of these kits have CRAP mufflers, and should be replaced with a higher quality straight through or chambered muffler (Dynomax is my personal choice). Be warned, these exhausts can get loud, and resonance is noticeable, especially when installed with headers. But, hp gains are awesome, as the stock Z exhaust is very restrictive.