I recently bought a Hotbodies windshield for my 2006 CBR600, and when I installed it, i accidentally broke one of the bolts, so I bought these.
They look absolutely great, you can tighten them easily by hand (actually better than normal bolts because you don't need any tools to keep them snug)
Like everyone else, I get a lot of compliments on them, and they didn't cost very much.
They are a nice touch to add to any bike. I prefer the arrow design as opposed to the straight spikes. The difference is subtle but I like them better.
None really... they loosed up a bit over time from vibration (what doesn't?) but since you can tighten them by hand, it's much easier. It gives me something to do at stoplights :-)