I ordered one of these a year or two ago, tried it a couple times, and haven't used it since. I thought the open jaw design would be wonderful. I think it takes more room than a clamp on.
I suppose it depends on what you're doing, but I didn't care for it.
At the same time I also ordered a solenoid tester. One or both of these meters had a big fat set of leads , that trying to use them was about like trying to stick your elbow in your ear.
I don't think anyone ever uses either one of them unless everything else is taken.