These sticks are fairly new, so you might not find too many folks who have had one for a significant period of time. According to the folks at ModSquadHockey, the Bauer XII is the 2007 version of the Bauer V (
http://www.hockeymonkey.com/bauervapor5sr.html).
Of the beer league folks I know, the Bauer V was a good pricepoint stick for those who didn't want to spend $150+ on a composite stick.
Off the top of my head, the Bauer V was something like 525-550 grams. The usual top of the line sticks tend to be 400-450. So it might be noticeably heavier if you have noodle arms like me.
In general, the blade is probably a little worse in comparison to the more expensive models and might get a little soft with time.
But a lot of times, it's just personal preference.