Calvin,
I have two going on their third year. They came as 2" sticks so it took awhile to get them going. One has blossoms this year, the other does not. I will be relocating them this year before they are swallowed by the goji berries.
So far I have excperanced no issues with them, I will update as time goes by. Who knows what may or may not arise over the next couple years.