I have a 2005 black/red BUSA and I also have the smart TRE:
<a href="http://cgi.ebay.com/ebaymotors/SMART-TRE-Timing-Plug-Hayabusa-GSXR-600-750-1000_W0QQcmdZViewItemQQcategoryZ35597QQitemZ45
80057956QQrdZ1QQsspagenameZWDVW" target="_blank">http://cgi.ebay.com/ebaymot....meZWDVW</a>
I have noticed a complete change in proformance but only because I got the bike remapped after installing it. I also installed a Yoshi system. My bike has alittle more than 5000 miles and getting to 185 in 6th gear is a breeze. Due to my guage only saying 185max I can't tell you how long it took me to get to 200.
Again not all TRE are the same. the only real 1 that ever got awards for its own work was the Ivan's Performance Products Timing Retarder Eliminator.