Besides all an aftermarket exhaust will do for your bike is increase the impression ratio.
I like that! Best statement about loud cans I have heard to date!
I had a stock can, wanted better flow, didn't want loud, so did it my way, just the tweety tube, increased the flow and also the slight increase in sound....not bad at all. Then still after more flow drilled out the spark arrester again increased the flow and sound, Now again same reasoning I purchased a LEXX...not much louder than my modded stock can but flows way better than any stock can could. Once you see a can opened up and see where they have the gasses forced to go you will soon understand why the stock can will never flow anywhere near what an after market can will. The LEXX is a good can for what it is a $200 slip-on with a quiet tip thrown in for good measure. I have run it without this tip in place....Holy crap batman loud is LOUD!!! It is ludicrusly loud! But it will allow your engine to process all the air it can get into it that is for sure! It is basically an open straight through pipe with a perforated pipe to try and catch some sound, it doesn't...lol. BUT it does make a noticable difference once you reinstall the quiet tip.
Now is it worth it or is it quiet enough for someone who likes the level of quiet the stock can gives you....maybe not!
If you are wanting a better flowing exhaust and are going to buy a can but just can't afford or don't want to afford the Staintune can which imho isn't that much quieter but doesn't need repacking at 3 times the price then yes it is worth it.
It is the quietest can I could find and just happens to be a cheaply priced one too. It is built pretty well, no complaints there, it doesn't need repacking as quickly as they say I have found. I thought it was getting louder so repacked mine, only to find out there was nothing at all wrong with the packing that was in it to start with, it was just that I was noticing the sound more that day and it was bothering me the more I concentrated on it. It wasn't louder it was just me. It also wasn't that difficult to do, I had never repacked an exhaust before this either.....once I got past the pissed off stage for spending money when I didn't have to it went well. I also used the best packing compared to just fibreglass bits or wading.
I think there is an even quieter tip but it would bring the flow back down to the same size as the stock exhaust hole so why bother?
Hope this helps....