Anyone dealt with the Extreme 450's?

I just got 8 of the Extreme 450's... I was told that Jason sells them too, as GC 450's, but theyre not. I've heard that they are EXACTLY the same as the GC 450's, and that a few guys left GC and started theyre own, so thats what these are... I figure ill give em a try, i mean, $45 compared to $60? Yea, ill give em a try! So has anyone else tried these?

Now just to clairify, im talking about the Extreme 450's, Not the GC Xtreme 450's...