Yes, it does work well. I'm getting much more natural results, especially using bounce, compared to the built-in unit.

Using mostly in programmed exposure.

So it seems to at least track exposure settings and also allows compensation ? That's better than I was expecting.

Looks like my little two year old is going to have to put up with being photographed a LOT today...

I've just ordered one from Jessops who are currently selling it online for £49.99...!

Should arrive tomorrow - I'll post how I get on with it and my K100.