Which thermometer works best?

I've had the Mobi Digital Ultra Forehead thermometer since my daughter was born (3 years) and it's been great. It seems like it measures the temp a little low so we always measure it against ourselves to see if the temperature is normal. It can also be used in the ear, which is a little more accurate. It's fast, it only takes a second or two to register the temp and it's easy to use. It isn't perfect, but it wasn't too expensive and since it doesn't get used too often (our kids really don't get sick) it works well enough for us.