If all you want to do is recharge a mobile phone, iPod, digital camera batteries or a laptop, this is probably more than you need - get a cheaper, less bulky inverter with a lower wattage. But if you want to run power tools or something that needs the high wattage, this is what you're looking for.
The reason I only gave it four stars is because it interferes with the car radio reception - to the point where it's not even worth having the radio on at all, because you can't really hear anything, although some frequencies seemed to be affected more than others.