These clubs provide a great deal of workability. Hitting a fade and draw will be easier with the 755 irons. The vibration dampening chip provides a lot of feedback; you will know when you hit the sweet spot and when you hit off-center.
These clubs have a smaller face and are less offset than some players will be used to. The loss of distance on mishits is considerable, so those that need a more forgiving club should look elsewhere. Sometimes, these irons do not react the way you want them to when attempting to work the ball, because of the smaller face and sweet spot.
A serious golfer looking to improve his ball striking will benefit from 755s, but they are a bit expensive at $600 (in 2009). You need to get fitted for these--if you are much shorter or taller than 5' 10", the standard 755 iron will not work for you.