They do the job well. I bought locally at Wal greens for the same cost. They don’t spin as freely as the competition which I personally like. Solid as hell despite being plastic. Non-slip pads on the bottom keep it from sliding around. The included pamphlet has a basic workout and short, yet helpful eating tips. These will be easier to travel with than the competition. As for comfort…Weight gloves solve any issues with padding. Or use household sponges. Or buy bicycle grips and slice them in half. All of these ideas should save you the extra $20 you’d spend on the competition.
If you use them, they’ll work. But so do normal pushups. These just feel more “natural” if such a thing exists.