The picture below illustrates the lens's angle of view on full frame and APS-C DSLRs (taken from our standard vantage point):
Superb optical quality, Fast, silent, and accurate autofocus; full time manual focus, Highly effective image stabilization (for longer subject distances, at least, Solid build, including dust and water sealing
Hybrid Image Stabilization still not particularly effective at macro distances; Precise manual focus at 'portrait' distances slightly tricky; Very expensive compared to non-stabilized alternatives