Steel ammo is crap. I try not to buy any but it is tempting due to cost.
Depends on the gun. It works great in my AC556, and obviously in my AK as well. The cases do tend to stick in my Carbon 15, and another AR build I did. But, if I squirt a little oil on the cases, keep the chamber clean and not rapid fire, the steel stuff is about 95%. In other words, "good enough".