Plasti-dip isn't terribly robust, and it does look really bad when it peels off chrome. With that said, if you don't know whether or not you want the look - then plasti-dip is the cat's pjs. On my 3, I plasti-dipped the grill first to see if I really wanted a completely blacked out rig - once I decided it was right, I used spray on bedliner for a more permanent fix. Contrary to the crap I give Twinmill, I do like some chrome (remember, my name, SuperBUICKguy? my Buick is a 1950 Buick and I wouldn't lose the chrome for anything on it) - thus, what's the style today (black being the new chrome) may not be the style in 10 years (remember pro-fairground and those pastels?), so completely destroying the finish via sanding really could come back to bite you....
everything has its place, and options are nice.