I have a few of these. The olive ones have made a few really great pens. In my experience, they are full of cracks, particularly at the dark grained heart wood. Surface cracks have been filled and I didn't notice at first. A bit of strategy in cutting it up will yield nice results. The 1st and 4th ones are really nice.
I bought an Acacia board and made some pens. They weren't very exciting. That wood is mostly being used as stops and clamps on my jigs.
Beware: I nearly bought one that had terrific grain color pattern…it took me several minutes and close examination to realize it was water color paint on the surface of an acacia board.