I love micro four thirds. Here is my new fl-600r flash. Decided to take advantage of the $50 instant rebate going on right now. Want to take my (lack of) photography skills a little further and delved into lighting. Been studying "Lighting 101" over at strobist blog the past couple days. First impression of the fl-600r: It is tiny! The only flashes I've owned in the past were the Canon 430ex II and 580 ex II, and this is noticeably smaller in comparison. The plastic that is used for the fl-600r also feels noticeably cheaper. I was split between this and the Metz 44 AF-1. Glad I went with the Olympus, although I've read that the Metz is built a little tougher, because I can't imagine strapping a larger flashgun to my EM5. My love for micro four thirds just keeps on growing.