Disappointed after several good experiences

I've ordered several of these over the past year or two. In general, I was impressed. The most recent order, however, was not so good. I bought the most recent of these for a family vacation. I got the cord and it worked at first. Then, within a day, it became intermittent. I found that putting half a twist into it made it work, and I was able to get through the trip with it functioning. Then, at home, (only a week after purchase) it really started to fail. Now, it's basically useless. Given that I bought several of these and only one seems to have gone south, I had to consider how to rate it. On the one hand, three out of four were good. The last one was defective. So I'll give it three stars. I guess I'll try a different cord to replace this one.

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