I know it's not the common view around here, but I just picked up the 12-40/2.8. I've had the 40-150/2.8 for a while. First of all, I'm finding the 12-40 to be a great lens, and I like it more than I figured I would. Anyway, I hear many people complaining about the size, but I find the size for a f/2.8 pro lens to be very nice, not that heavy, easy to handle, and easy to travel with. Yes, you can go much smaller, but coming from Pentax (which was probably the smallest APS-C kit), the equivalent Pro kit from Olympus is still noticeably smaller and easy to carry. Considering the image quality I can get from the E-M5, grip and 12-40/40-150, this is a very handy kit. Discuss.