I just picked up a Panasonic 20/1.7 after having had my EPL-1 for a little over a year. I've been using the 17/2.8 and have never really felt like I was missing something but I wanted to try the Panasonic 20 as it has become something of a cult favorite. So far I'd say I have mixed feelings about it. It's nice and sharp and I rather like the equivalent 40mm focal length. It reminds me of my Konica Auto S3 rangefinder with it's 38/1.7. I find that I am very comfortable with the focal length as it mimics my earliest film days. I like that. I also like the extra speed as it makes indoor low light photography a bit easier. If first impressions are anything to go however I'm not quite sure WHY it's such a cult favorite. It's fast, small and sharp (and that's good) but it's also noisy and slow to focus. The first few shots I took with it are nice but not spectacular. I suppose I just need to keep working with it. I think it's a matter of expectations, I am much more impressed with the 14-42 kit lens because I expected it to be terrible and it's not...it's actually pretty good. I expected the 20/1.7 to be AMAZING and it's not...but it is very good.