It's a good all around zoom that I picked up while waiting for the trickle of wide primes to arrive. Better on the short end than the long end. I have been shooting mostly at f/8-f/11 with it and am happy, although if the Batis 18 were available at the time I likely would have gone for that. There has been talk of copy quality variance, another thing to consider.
Dave
I should add that the a/f performance is not as snappy as say the 55/1.8, but the focusing ring is nicely dampened for manual focusing.