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I never have a problem with it. There must be something with your set-up or environment that's causing it.
 
Tell me about it. I've been having a horrible time with my MB. I can be sitting on top of my AP and have 1 bar and a 1Mb connection. Absolutely unacceptable. Going to the Apple store again about it when I get a chance.
 
This is often a hardware problem in the computer (loose antenna, being the common source) or a problem with the base station. Try changing your network to a different channel and see if that helps, otherwise, I'd get a Genius Bar appointment.

TEG
 
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