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I've had the 01 standard prime, 02 standard zoom, and 03 fisheye since the system debuted. (Yup, I have the original Q body. Two of them, one new and unopened, even). I toyed with an auto 110 adapter and a 50mm lens, and was impressed with the reach of such a small lens... but not the sharpness. I've had the 06 on my radar for a long time, but due to lots of issues (girlfriend, job, family) I have almost zero time for photography anymore. But.... someone spied that lens on my amazon wish list, and it made it into my christmas stocking this year!
So far I'm really, really impressed. I've always loved the 01 standard prime, and just sort of tolerated the 02 standard zoom. I thought the 02 was nothing special. Not particularly sharp, but not bad. Images from the 01 lens seemed to pop, and something about the 02 just left me flat. The lens makes technically good images, but I just wasn't impressed. But the 06 lens... wow, that's what I was hoping for! It reminds me of the Tamron 28-75 f/2.8 in image quality. I don't have to try very hard, and it makes sharp images with decent bokeh (for the Q). It's fun to handle and fun to use and it focuses nicely in low light too. I'm really, really pleased with it so far. The only thing I don't love about it is the minimum focus distance. I'd love to find something Q-sized that works for macro photography. (I have adapted k-mount lenses that work almost like microscopes on the Q, but nothing that's hand-holdable in the field)
Anyhow, I'm really digging this little lens. It's rather revitalized the Q platform for me, and I'm thinking of using it more often. Maybe even snagging a Q7 to take advantage of the larger sensor and wider FOV.
Charles.