Ironwood is the only wood I ever want on my knives. It's extremely durable, doesn't dent or scratch without on heck of a fight. I also am pretty sure it doesn't warp anywhere near as much as other woods. You pretty much have to try and mess it up.
The only thing to be aware of is that Ironwood darkens a little with exposure to sunlight. If it's going on a knife that's going to be outdoors a lot, those gorgeous exhibition grade pieces of Ironwood are going to be wasted in a few years, when the wood has darkened. Aesthetics aside, Ironwood is an excellent for a knife that will see heavy use.