They are very good, you can load them up and maneuver the clip into position. Feel around with your fingers then release it. Your face is a good distance away if it goes wrong but it never has. Removal is a matter of getting the clamp into position then compressing the clip.
Now I have the cable type I wouldn’t be without them, I used the water pump pliers in my picture to pull what was left of the rubber coolant hose away from the oil cooler, in combination with the cable pliers on the hose clamp. It took all my strength and 3 separate attempts to remove it as the hose clamp itself would open, but not slide down the pipe. Even though I avoided using plumbing tools on the clip itself, I still managed to injure myself!Just a warning about using water pump pliers etc for removing these hose clamps.
I'd used them to slide the hose clamps back down the hose. If the pliers slip, which they probably will, it's no big deal. If however you try and remove the clamp completely from the hose and they slip, the clamp acts like a lump of shrapnel and can fly anywhere. It would definitely cause serious injury if it hit you in the face but could also cause paint damage if it pinged off the bodywork.
The large clamps on the air intake pipework are particularly deadly.
After one near miss I invested in a set of the 'cable' type hose clamp pliers.