Last summer was horrendous for me and I cowered indoors for a large part of it. Rather than moan the entire time, I want to buy a portable air-conditioner unit that I can take in the car, plug in and freeze myself, regardless of what is happening with the weather. Does anyone here have any experience with smaller 'personal' air conditioning units? I am after knowing prices, efficacy, portability, suppliers etc. Thank you. Dominic