I had two friends that tried them.  So my knowledge is very limited and second hand.

No big deal to install. Friend does his own horses. Put them on and rasp to shape.

He rides A LOT. Endurance  rides every two weeks.  Conditioning rides in between. Mostly in Western Colorado high mountain desert. Rocky hard terrain.

His complaint was the nail holes opened up from the wear.  The shoes flex. But that flexing causes the nails to wear the holes out. The shoes themselves held up, But the nails begin moving in loose nail holes. Which in turn caused hoof wall problems. He went back to steel shoes.

If you don't ride a 100+miles a week like him, or spend your time on softer ground than our Rocky Mountains, they may be just fine.

There are many choices for better footing on rocks. I suspect for the casual rider, the Ground Control shoes would be fine.

Here in Utah plain steel shoes do well on our Utah shale and red sandstone. Just enough bite in that softer rock. But when I go up to Wyoming and ride on their Granite, I don't want steel shoes at all. Aluminum shoes or apply the Drilltec/Boran to the shoes for better traction.  Nothing like a 4 legged skid down a large sheet of Granite to get your blood pumping.

The addition of Drilltec is just a welding process where the farrier applies a harder compound to spots on the shoe. Much like a Caulk, it adds traction. great on ice, snow, and rocks, sometimes not so good in softer footing where you want some give to prevent strains or pulls in the horses legs.

You may even consider some Easy boots or Boa boots.