Size 13 here as well, no problem with the size from the ones I tried when I had cheap shoes. However, I agree they wear out way too fast. Ended up being cheaper just to get myself some good shoes in the long run.
I'd only get them again if it was an emergency. Though I could see a better quality version kept in my bag maybe an adjustable leather or heavy canvas. Velcro bottom and multiple sole choices would be interesting.
If nothing else something like that would give women more options as my wife gave up trying to find a womans shoe with changable slide soles.
