No cons.
Pros: Smoother shifting, easier to find neutral....Instead of modding the stock star, I bought a Cascade one ....worth the 35 bucks IMO. While your doing the shift star, might as well throw a pancake bearing and new idler gear bushing in there too. Cheap mods and worth the piece of mind IMO.
Here ya go: http://www.farmandsandtoys.com/partdetail.asp?partid=69