I would say it's a good wood to use. The fruit from the tree is Best used for jelly and it is a Hardwood. From what I have found it is also a very fragrant tree. So I say try it out and let's see some results.
Ain't never used it (fact is, ain't never heard of it!) but the rule of thumb is, ifin it bears fruit should be okay fer smokin, however, I would do a google search on it ta see ifin there is anythin out a the ordinary bout it. Give er a whirl on a fatty ifin it looks like a green light.