I won't even try to defend BOSE for home use - I've never heard a system, and as I was flipping thru the Crutchfield catalog I couldn't believe their prices :Q My orthodonist has a wave radio, it looks cool and sounds good. Is it worth $100? No, probably not, but it does the job.
BOSE car audio on the other hand is very good, espically like another poster said, compared to other premium car audio systems. I have a car that came with the non-upgraded speakers, and I spent $300 on a Pansonic deck, $150 on speakers and their installation, and $100 to get a used base tube installed (the tube was probably worth $100, got it from a friend). Okay, so that's $650 worth of upgrades. It doesn't even come CLOSE to my friend's Cadallic Escalade and his premium BOSE system. I have no idea what the upgrade charge was to get the BOSE speakers (or if its standard?) but his is much better than mine.