We had a thread about this within the last month. It so happened that when it was posted, I was right in the middle of a four day defensive shotgun class and got to see some of it fired on paper. The stuff I saw was 00 buck. It did ok. It didn't provide the tightest pattern in any gun I saw it fired in, but it wasn't bad.
If it cost significantly less than other buckshot (I have no idea what it costs), I would certainly buy it for practice ammo. On the other hand, who knows, it might pattern great in your gun ? This is the same philosophy I use with Wolf ammo in 5.56. It isn't the most accurate ammo I ever fired out of my AR15s, but it isn't bad. And, since it is almost half the cost of anything else and is even cheaper than handloading 5.56, I buy a lot of it for practice ammo. When shooting it at cardboard silhouettes and steel as fast as I can get a decent sight picture, it works great. I don't shoot it in my 24" scoped AR however. It has it's place, and it does very well for me in that place.