I just invested 2 ETH in the Angel Token ICO less than 30 minutes ago, and I think this is the best ICO to invest in right now.

They offer an 80% guaranteed refund until March 2018 so even if it flops on the exchanges I would only lose a small amount, but I get to be part of their "investors insider group" in the meantime and if it goes up on the exchanges I can sell with a profit. Definitely the best ICO this year and I just wish I had more to invest!

I posted here about my investment a few minutes ago: https://bitcointalk.org/index.php?topic=2385917.msg26175534#msg26175534