I needed a small modification so that the description associated with the images linked to a selected article and the developer was back with one line of code within a couple of minutes.
I've worked with Joomla for roughly 6 years now and I think this is one of the best extensions I've come across.
I had a problem with using it in IE7 (IE6 was OK by the way) - the map would disappear just after loading. I searched the net to work out the problem, couldn't find an answer apart from reading through the reviews. Soon realised it was probably a problem with my template rather than the plugin - it seems most people need to resolve this by emailing Mike Reuner as the problem is different everytime.
Mike got back to me overnight (I am in the UK) - my problem turned out to be a problem with my CSS - I had used position:relative; in one of my selectors. Mike suggested removing this line.
Made the change and all works fine now in IE6, IE7, safari and FF3.
I can only say read through the reviews if you are in any doubt about using this plugin - 200+ people can't be wrong.
Pizza money is on its way.