I have never changed out the links on a watch band before, but I hate having to go to a jeweler and spend $20-35 to have it done. So I forked out less than $5 bucks and took the plunge. Well, it is incredibly easy with this unit. And the best part? I set the size, wasn't sure if I liked it, and was easily able to reset it to the next size. So it is definitely worth it.