What's the deal with Toptal?

Hi. I'm a JS developer located in Eastern Europe. I'm happy in my current job and I do pretty well (~23 usd/h). However, for quite some time now, I've been looking into Toptal.

From what I've gathered it's not that glamorous for US developers, but in my case, I could double my salary.

On the other hand, reading about them online brings lot of different views. Some say they're scam, some say they don't care, some say it's great. I've also seen lots of replies here on HN from people who just made an account to post a positive review.

So which one is it? Could anyone comment on them?

Thanks!