Summary: I switched from Canon to Nikon when the D90 was launched specifically for the video capabilities. In hindsight, I should have stuck with Canon and stepped up the the 5D, but that's history. Nikons are tough to beat for still photography - my D3s are still go-to cameras for paid stills work, but I got tired of waiting for Nikon to take video seriously, so I invested in several GH2s. The video quality produced by the GH2 is simply amazing.
Summary: I use this camera all the time and love it. It is so small but so high quality! Much easier to carry than the Cannon T2i I was using before. Lenses are interchangeable with my AF100. Bought it used and it has been working perfectly - very pleased with my purchase!
Summary: This is a great all in one still image/video package. It does feel plastic-y and isn't as rugged or solid as a DSLR but at the same time, it's very light and compact. It feels like a point and shoot camera, but with much more manual controls. Which is a good thing, making it ultra portable. In my opinion, the GH 2 is better than the newer GH 3 in terms of what I mainly use it for: video.
Summary: This is the easiest camera to operate. My photographs are good every single time. This camera is opening up photography for me in brand new ways because it is so intuitive simple and satisfying to use.
Summary: I do not think I will ever be able to give a camera a five star rating so do not take four stars as meaning anything but a fantastic rating for this camera. This is by far my favorite digital camera. I have purchased two of these, I bought my second one when the GH3 was announced and it was considerable larger than the GH2. Its size is what really sets this aside from just about any other DSLR out there.