I have used a few of them.  The Giraud is the best one I have used.  If you are going to do anything more then a few rounds and you are a serious reloader, it's the way to go.
The WFT works if you just need to do a few rounds but isn't up to serious work (hundred's or thousands), your hands/fingers will take a beating and it doesn't chamfer so you will have to add another step in the process.  It is accurate enough and I keep it handy when I just want to test a handful of rounds.