Its light and its small, so small in fact that I find the controls a bit fiddly and in common with quite a few m4/3 cameras, I've never really found a comfortable way to hold it. To be honest I don't use it much, but I do want to keep a m4/3 camera. I was actually thinking about going 100% m4/3 before the D800 and D800E arrived and blew me away, but thats the way things go.
There are a few interesting things about the E-PL3. Its generally reckoned to be a smaller version of the E-P3, but I'm not so sure. It has blindingly fast AF, to be honest I couldn't tell the difference between this and the OM-D and it also has a very quiet shutter. It produces excellent images which do contain quite a bit of moire. This is normally a tell tale sign that there is either no, or a very weak, anti-aliasing / low pass filter. I don't remember seeing as much of this in any other m4/3 camera. Add in the fact that the images are very sharp indeed, have luminance noise even at base ISO, and the high ISO results are very poor and I believe the E-PL3 has the weakest AA filter of any m4/3 camera. I like that, personally, and while the OM-D sensor (which we now know is made by Sony) is undoubtedly the best all-round m4/3 unit available, for me this one has its attractions.
As I said, I don't use it very much, and I have to almost persuade myself myself to use it. Again after the arrival of the Nikons plus having the NEX-7, it does get ignored somewhat. However I'm planning to keep the outfit pictured above. It seemed pointless to keep three m4/3 cameras that weren't being used much, but I can cope with one.