I have a set of these on a 10-degree wall and 20-degree wall in my garage, incorporating them as part of traverse/circuits that I do to train resistance. I've oriented some as vertical or diagonal pinches and some horizontally, as "long crimps."
The holds have been amazing—for me, the main selling point is the ergonomic dimpling, which lets you settle your fingers comfortably no matter how big your pads are—the options are myriad. And, of course, you can also rotate them for a great variety of grabbing options, for either hand.
They have provided 5.11+–5.13 difficulty (as part of 20- to 40-move circuits), and while they initially feel positive in your hand when you latch them, are just tough enough that it's hard to pause to shake out—so, perfect for training resistance. Like, chalk up, maybe, and then get moving!