I actually think the 1st and 3rd ones are cute! The colors on the 2nd are too jarring for me. But the other 2 make it look like a special edition bag.
But I would only use it or any handle cover if you love that look, don't use it just because you want to protect the handles. What are you saving it for? Just use it! It's like putting a bra on a car or vinyl on a sofa.