I was home schooled for a while, but I was not forced into it. When I broke my arm around age 12 after falling off the garage roof, the bone had to be set and then put in a heavy cast for about six weeks so it could mend. Naturally, this would be impossible if I had to attend a school where I constantly had to defend myself from bullies; so my mom and everyone else agreed that I should be allowed to do all my school work at home. After trying it for six weeks, I decided it wasn't so bad and later signed on for permanent independent study status.
Academically speaking, I can't say it was any better or any worse than attending public school. The books I studied from were exactly the same. I am aware that some Christian parents are actually able to exclude books from their child's curriculum that mention evolution, but I never knew any home schooled children in which this was the case (perhaps it was illegal in my state).
Some people on here have mentioned the social aspect. While I will concede that being exposed to people of different cultures could give a JW some perspective on their own beliefs and lifestyle, I think just watching television or reading non-JW material could easily serve the same purpose. I would say that, if anything, being a JW in school just reinforced my programming. Not being allowed to participate in class activities that involved holidays, patriotism, sports or evolution just made me stand out and feel even more alienated. What really opened my eyes wasn't interacting with kids of other faiths, but reading books written by adults who actually knew enough about the Bible and Christianity to make an intelligent critique of them.
Maybe there are some decent public schools out there, but if there are they must be pretty rare since I attended six that were all pretty bad (though some were worse than others). I can't imagine how any parent, no matter how apathetic or anti-intellectual they might be, could possibly do a worse job of educating their child than the typical American public school. The only conclusion that I can draw from my experiences with both public school and home school is that, unless their parents could have afforded to send them to a private school, children who are home schooled aren't missing out to any significant degree.