I use the Flying Dutchman #1 and #3 Ultra Reverse a lot. The #1's are small to get into fretwork or anything really and you can cut pretty thick and hard wood even with that small of a blade. Benefits of UR's definitely is that it cuts down on "frizzlies" on the back side. When they start really appearing again, the blade is starting to get dull, but I just normally sand the back anyway. As far as the Reverse blades go, there is a little indent on the top of the blade and that indent goes at the top, so it is pretty easy to figure out which way to put the blade in and you don't have to look at the teeth. This is my two cents. Someone else may have more knowledge on the subject.