I had the GF1 for a brief period and was impressed with the quality of the images. For such a little camera it really packs a punch. The 20mm f1.7 pancake lens was great, lightning fast auto-focus and stunning image quality.
It was when I slapped on the 45-200mm that I was less impressed. I found the auto focus to be slow and it often locked onto the background rather than the subject.
Still, an amazing piece of kit - but I'd agree it's expensive.