Hi -
My experience with the E30 has been very, very good. I've been a decades-long Olympus user (first OM-1 in 1973!) and I use the E30 primarily with the outstanding 12-60 lens.
If you let the camera do its thing, it scales very nicely up to ISO 1000, which while a tad grainy remains eminently usable.
The following were taken during a recent birthday outing: All hand-held, ISO between 200 and 1000, exposure varying between 180th and 1/5th sec, 12-60 lens, usually f2.8...
These two were taken in virtually no light and with very slow shutter speeds:
Here the ISO dropped to 200 and higher shutter speeds came into play...
Let these be a simple indication that you can indeed get some rather nice results under less than optimum conditions...
JohnF
PS: the E30+12-60 is extraordinarily well matched and has slam-dunk extremely fast autofocus...