Many players forget that a lob wedge takes a lot of training. Not a club for the beginner, it is very easy to
skull, which means hitting the ball too far up it's side. Another disadvantage of a highly-lofted wedge is the high dispersion of the shot landing pattern, as proven by
Pelz in his
Short Game Bible.
A lob wedge should only be used if no easier alternative exists, as it is always a high-risk shot for the average amateur golfer.