I've had quite a few cocobolo handles over the years, mainly customs, and they were working knives. The cocoblo has held up well. Like any wood, they will expand and contract, but they are very durable. They will get darker over time, but I've been told a wipe down with Rennaisance Wax will bring back their luster.
I have had a few ebony handles too, and one of my favorites is my Tribal Spear. It is a great knife, and the scales have held up great. This is not an EDC knife though.
Right now, I have several GEC knives with wood scales, and they are durable and have not expanded or shrank on me. I believe they are bocote wood (the Beaver Tail knives, a 73, 72 and 48).