Really good: Sigma 18 - 50 F/2.8 While I'd heard some negative thinks about Sigma focusing problems on Olympus cameras, this lens turned out to be an incredible buy. Great bokah, sharp and focuses quickly except in really bad light.
Really bad: I down loaded the Topaz In Focus trial and this piece of software was extremely underwhelming. I'm a huge Topaz fan but In Focus really didn't live up to the Topaz claims. I found you could get the same results using USM in any PP software. Maybe I didn't play around with it enough but I uninstalled it after 2 days.