Have had an Emerson for a few years now. Rarely leave home without it. Even use it sometimes at home, when we have more company than our home machine can handle.
We bought it when it was on sale at Target, for around $100. It is a little smaller than some, but we like that for transporting. We have never had one bit of trouble with it, though some people have reported problems with theirs.
One trick I have learned, is to carry a little sandwich bag of ice with us, to chill down the water we put in it. We always save a bag for next stop. I am not sure how long it would take to actually get ice without cold water.