I've had them. I've used them. they're great.
Except for this-
The regular flip up grates are just so much easier to handle.
They're one piece and you can lift them with one hand or a decent set of togs and move them to the side or refill charcoal.
The STOK grates will require more maintenance to keep seasoned and from rusting and they will require more work to futz with when you're getting going. you can also hang the flip up grates off your kettle/ Performer. Notsomuch with the STOK grates. My first 22 inch kettle was a STOK, I lusted after craycort grates and bought the STOK specifically for the CI grates. as time goes on, I'm realizing I don't need a whole lot of stuff I thought I did originally.
Charcoal baskets/chimney/boxes of wooden matchsticks/good set of tongs/weber lighter cubes/remote two probe digital thermometer. Those are my essentials.
I don't mean to discourage you, just relaying my experience.