tried XnView several times, but I've stuck with Irfanview. Something about the simplicity of the default view, I think. The default view of Xnview doesn't really do it any favours, methinks. It can obviously be changed, but there's still a lot of things that counts in Irfanview's favour for me. Xnview does seem a little more powerful, though, so I'll definitely keep an eye on it and continue playing with it, but I need to be convinced, I suppose...