Just got one of these babies from Punishers. I didn't install it myself, but the proshop said it was a royal pain in the @$$ and it took them an an extra day or so. However, to some people it looks waay cool and it makes you different from any other dude with an ION. Overall, I'm happy i bought it and I wouldn't go back and change the decision.
"If the ride is fly, you got to buy." Go ahead and get it if you have a $100 bucks toward an upgrade lying around and you want to stand out in a crowd. However, don't expect it to make it as cool or good looking as a milled and faded etc., high end marker.
not to insult you or your proshopbut installation should not have been that difficult. only thing that may give you problems is the c clip. beyond that installation was easy. installation took me a half hour. that included me breaking down my gun, cleaning and relubing.