In reply to Mark Haward:
Hi Mark, I have a set of Petzl IRVIS HYBRID, so like the Leopard - Aluminium heal but then a steal toe part but still linked by cord, I use them mainly for ski touring, haven't had them long enough to comment about wear, but you asked about being fiddly to put on, yes the first time, you need to make sure you have the fit exact and then re-fit them once they have been on a while ( you only need to do this once, I think it is to do with the cord getting wet and stretching to start with), once you have done this the first time they are fine and go on easy, really happy with mine, but not sure they would go on an approach shoe?
cheers