I've had a couple of weeks with the OMD now, having come from a Nikon D300 / D5100 background. I'm shooting a wedding reception for my daughter's best friend at the weekend so have added a FL-50 flash to the kit - currently OMD, 20mm panasonic, 14-45mm panasonic & 14-140mm panasonic with a 45mm Olympus on the way. I still have the D300 as backup(!) in case it all goes horribly wrong. I have found DxO to give the best RAW conversion so far. DxO does not currently support the 14-140mm for auto correction hence the addition of the 14-45mm for the wide end where the distortion & CA correction are really needed. I use an op/tech strap with the sling attachment so the camera strap is slung over one shoulder with the camera ready to slide up quickly for shooting. The system seems to work very well so far. The FL-50 seems excellent. I tend to shoot with TTL flash bouncing wherever possible and using a Demb type diffuser for fill if needed. With the camera set in manual with auto ISO I've found that the flash tends to up the power to maximum before raising the ISO, unlike my Nikons which are too quick to raise ISO settings. About +1 EV is needed on the flashgun to get the right exposure (on my SB800, it was about + 2/3 EV). With the camera in A or P mode, the camera seems more ready to raise ISO than in Manual (before you ask, I have set up auto ISO to work in M mode and it does raise ISO with flash if needed). Auto WB, however, does seem more susceptible to bounced flash bounce surface colour than my D300/SB800. For flash based event photography, the OMD + FL-50 or similar presents a compelling option for somebody like me with a very dodgy back and arms like pipe cleaners. The D300 + SB800 + appropriate lens was just too much to manage for a several hour event.