I went to law school, borrowed the bucks, been working for just about 6 years, and don't regret it.
But, I'm still skeptical anytime anyone else goes to law school. And it has to do with what is your next best option. For me, there was pretty much no decent next best option, but if you're already been working in business for a couple of years, or if you have relationships that could get you into a job that has some growth potential, the analysis changes dramatically.
Most biglaw lawyers are out of biglaw by the time they have finished paying down their debt, so one way to look at it is that they slaved away at a high pressure high hours job to pay the cost of law school, and their real career starts at that point. But they jobs they walk into are often no better than they could have been at if they had just taken the other opportunities originally instead of law school.
Many accountants come to law school, because they realize that they are working half the year just as bad or worse than the lawyers, for 1/3 they pay. But if they'd just stuck it out another 6 years, I think they would get a better exit than if they went to law school for 3 years, then worked as a junior associate for three years.