We have one of
these.We got it for camping, and put it outside on a table. You can find them on sale for about $100.
It produces ice surprisingly fast, but like the others have said, the ice it makes is not very hard and melts fast, but it does work. The darn thing pulls a lot of power when it is the cooling cycle, so I usually run a separate line back to the power post. We set ours up if we are going to be at a campsite for more than a couple of days or we are having a lot of visitors - otherwise an ice chest is less trouble.
If you get one, don't turn it over or on it's side during transport - it will damage the unit. When it is not on, the refrigerant is liquid and it will run down into the cooling tubes and stop them up. Check your instruction manual regarding this.