I played about with the free version for a few months, but finally decided that the best way to say 'Thanks' to the Hikashop team was to purchase a commercial licence.
It was a small price to pay for the help I have received. Well done guys, and judging from some of the other reviews here, I'm not alone in wanting to say a big thank you!
I had a glitch when I then installed 8 instances on my site. While waiting for the developer to reply to my support request, I had a look at a few other slideshow extensions, thinking if the glitch couldn't be fixed, I would use one of them.
Boy, am I glad that ShowPlus was my first choice. And even happier that the glitch was sorted. (Turns out it was a problem with my server, not ShowPlus - developer found this out for me!)
Seems to me that ShowPlus is the simplest, most configurable slideshow extension out there. And support is quite frankly, exceptional. Don't forget though, that the developer has a life, and might take overnight to reply!