I finally got round to trying out the Sukie iron-ons this evening.
A pretty simple process, and I am really happy with the outcome; the green of the butterflies against the green of the t-shirt works really well.
Please excuse the photos. They look worthy of a 99p starting bid on eBay!
The transfers are suitable for light and darker backgrounds as they are the slightly rubberised, and I am looking forward to having a go on some other fabric. After a 'multiple soup incident' with the twins at tea-time, I think I need to make some (huge) aprons, and the sweet animal decals would be ideal decoration.