First of all, I just want to say that the craftsmanship of this piece is extraordinary. Bends and welds are perfect. Fittment was perfect as in it lined up perfectly to my Meisterschaft axelback and the cats. Only thing I had to buy were new exhaust nuts and bolts because the stock ones were welded on. Upon start up I was very impressed with how much of a difference the resonators made in cleaning up the exhaust note. Idle is similar to stock but when you rev it, it just sounds perfect. Under load, it feels more responsive and quick. And the sound is just amazing. Very exotic like. Here's a video:
370Z Nismo Meisterchaft Axelback AAM 2.5" Hpipe Resonated Midpipe Revs - YouTube