Trekking bars are great because of their versatility. It's a good solution for flat bar riders who envy drop bar rider's multiple hand positions, but don't want the expense and hassle of converting their current ride to drops. All told it cost me about 60 bucks for the bars, tape, grips, stem, and helmet mirror. I don't recall how long it took me to change it over because it was a labour of love and time stands still when wrenching my bike.