When Cleveland called this irons the Altitude they weren't kidding. However this does not mean it balloons it up. What it does mean is that it will make it easy for those with low swing speeds to get the ball up in the air quickly and easily.
It maybe stretching it to call the Altitude a set of irons as they are visually a bit more like iron shaped woods given their deep rounded heads. The 3 and 4 'irons' are definitely more like hybrids and the head could possibly be a little longer as the styling goes a little awry here, even though they do the job very well.
The mid irons are very good for this level of club with a good size head and not too much of the wood styling on the back. However for the 9 iron and below it may be worth switching in the Cleveland MT irons that will be just as forgiving and maybe a little easier to use.
The extra size in the head gave a nice 'zing' sound at impact and the feel from the face was very good. Cleveland are known for forgings and with this carrying the 588 name it does have a forged face, but this is a bit of overkill in this type of club despite it being a good selling point.
Overall if you are a senior golfer or a slow swinger of the club then using most or all of the Cleveland Altitude irons in your set will certainly get your ball reaching new heights on the course.