That's the beauty of anecdotal information. Both stories can be 100 percent true and completely in conflict.

I have read a lot of reviews from various sources. Some folks write glowing reviews, some folks say they are decent value for the money, some folks say they are garbage from the start and get worse.

net information gained = -Zero ... or ... whatever suits you best.

I have two sets of Vueltas and just ordered a third. if they turn out to be bad, I won't ever buy more.