Product review (4 stars): Good for what it is
Even on AC power, the peltier device is underpowered for the size of this cooler. At best, you can get about 30-35F below the ambient temperature, but the device is rated for 40F. That said, for this size, in this price range, I don't know of a better unit. The fact that it can run off of 110v AC or 12 DC is great. Also, the "rollerblade" style wheels are much better than the hard plastic pieces of junk you'd usually find, i.e. they roll more smoothly and make a LOT less noise on hard surfaces. With a slightly bigger thermoelectric cooler and fan, this would be perfect, but as it is, it really needs one of two small ice packs as well, so I'm knocking off one star.