the bokeh on this lens does seem to be a bit schizophrenic - sometimes rather pleasing other times a little harsh.
nailing focus on the E-p1 is a little tricky wide open, maybe with evf it would be a little easier, but over all i like the results i get with it. It also stops down nicely. Also wide open is has an odd glow which can work in some situations
here are a couple more shots with it -
first one with the e-p1
then a couple on the E-510
and finally on a full frame Canon 5d Mk2