I have tried a few, I did not like them.
If you didn't know, how they work is you fill a hopper with water, the machine creates the ice, then dumps the ice into an uninsulated basket, where it starts to melt and re fill the water hopper and recycle the water.
Mine all made the ice with the hole in the middle of it, so it's already 1/2 not actual ice.
The ice was never really frozen, it was just hard enough to fall out of the holder.'
I've seen some from vevor that look promising, but at $2-300 a $4 bag of ice seems like a pretty good deal.