I use these freewheels to upgrade old 6 speed downtube shifted bikes to 7 speed flat bar bikes which usually gives them lower gears with the 28T and a much more serviceable bike. They have very smooth low friction bearings in them which belie their low cost. How these can be built for what they cost is amazing to me. Trying to convert these bikes to 8,9, 10 sp is much more complicated and expensive so this is the way to go. Watch for chain rub in high gear as Sheldon notes.
Bottom LineYes, I would recommend this to a friend