Gform are as comfy as an arm warmer but they don’t inspire in protection terms, very thin, they can slide around a bit. Very good for minimalism though, I like mine but they feel like they have their place.
I love my POC Bones- the hard plastic ones. Counterintuitive but they’re very comfortable, despite being massive- the design means they don’t really need to be held in place, they lobster around your arm and stay where they’re put in a crash so the straps are very slack. And the protection is absurd. You’d think they’d be hot to wear but again, the design means they don’t need to be as enclosing as most arm pads so they’re no warmer than the Gforms, might actually be slightly less.
The downside is you look like a fanny.