I purchased a G1 on a whim as well... no lenses just a body followed by 3 adapters for Leica M-mount, Pentax K-mount and M42. I purchased mainly to have some fun with my Pentax/Takumar collection. I can't comment on the native lenses but I figure they perform quite well... I've only had it for a month or so... here are my impressions. * The 2x crop factor takes a bit getting used to. Your wide angles become standard, standard become telephoto, and telephotos become almost impossible to handhold for focus. On the other hand, its wonderful to have a 90mm on my rangefinder suddenly become FOV of 180mm when I switch the backup G1. Telephotos are a weakness for rangefinders and the G1 fills in. Here's one.... Summarit 90mm f/2.5 usually on my M8. I swapped it over to the G1 for a concert. Not the best of conditions to shoot (terrible light, vantage point and color casts). But hey... what can you do * The camera works ok with vintage Macro lenses that do not have a stop down feature since you have to manually open up, focus, and then stop down the lens. It works much greater with those that can be easily stopped down. The articulated LCD works in favor. You get a tiny bit more DOF. Tamron 90mm f/2.5 Adaptall SMC Takumar 100mm Macro with Ring light. * Because of the vintage glass with the 2x crop (digital you tend to pixel peep more too), you are really pushing the limits of the vintage glass. I said in another thread, you really see the incremental improvements of optics over time (Takumar, Super Takumar, SuperMultiCoated Takumars in my case.) Stopped down, some old glass can produce wonderful results. * I like the fact that preview and histogram can be examined in EVF. No need to move the camera from your face and the sun is blocked out from view during sunny days. * EVF is very good actually. I'd say 80% as good as optics in normal light. It auto brightens when it gets dark but the refresh rates drops dramatically in low light. You have the option of digitally zooming in for focus which is really nice. Critical focus is still relatively slow and I do have a fair amount of misses. I hear AF is pretty darn fast on the Panasonic (faster than Olympus m4/3rd)... I'd probably try it out myself (once they hit the shelves used and cheap). * EVF does kinda suck when it comes to continuous mode. While the picture is taken, the image blanks out (longer than SLR mirror) and I haven't figure out how to turn off auto preview (Does anyone know how?). Makes it hard to keep a moving subject framed while in motion. * None of the adapters I know will stop down lenses. So you'll need to make sure you can manually stop down the lenses to be used with the m4/3rds or you'll be stuck shooting wide open. * Flash TTL does not work with adapted lenses. I get every other shot over exposed and the rest under exposed. I have a Leica 24D flash in auto mode that works and perfectly sized. * For me, the Takumars worked best as they have a switch to manually stop down the lenses. Neither rangefinder glass nor my K-mount pentax lenses have this ability. * High ISO is not that great compared to other cameras in the market. Here is ISO 1600 put through Noise Ninja with only color noise filtered: * The details rendered are pretty good but are not up to par with my Leica M8 nor my Canon 1D MII. I took similar tests photos with both the M8 and G1 using the same glass and it is pretty obvious side by side. Looking at some samples online, I get the feeling that there is a fair amount of optimization going on when the G1 is used with native glass.. either in body or by design. I can't quite put my finger on it.... much higher than P&S quality but not quite up to DSLR. I'd probably get a better understanding once I have native glass to shoot. I'm hoping to get my hands on the 14-140mm just to see how well the super zoom works. I hear the 17mm is awesome on the G1. * The camera has a nice overall feel to it and it is sized pretty well. It is a light camera and comfortable to carry. Those who wish more compactness will probably be better off with the GF1 or one of the Olympus equivalents. I like having a grip of the G1 body. The rubberized finish is very comfortable. * I know that lens based IS is probably better but at this price range and for what I use it for, I REALLY really wished the G1 had in body IS. This would mean all my lenses are stabilized. For this fact alone, I am considering the E-PL from Olympus + EVF. I've attached a few more taken with the G1. * Red tricycle is with a SMC takumar 135mm * Bald Eagle and Falcon taken with an Super Takumar 200mm f/3.5. * My Son by the water fountain was taken with the SMC Takumar 50mm f/1.4 Overall... a good camera and I am pretty satisfied with its value versus performance. It brings lots of fun for those of us with old glass. It slots nicely just above the so called "Bridge cameras". I can only see further improvements to this newish system. I sure hope they improve their selection of glass AND keep the cost down.