Maybe freebitco.in is the most trusted site to generate bitcoin. Although the bitcoin produced is not so much, but it's really reliable, because it has stood since the first.
I would say the same. Just start with faucets like this to lern how it goes and how to handle btc. If you got a good feeling for this, you can start acting with higher amounts.
faucet is annoying this only profitable for faucet owners, if still wanna work on faucet so Raiblock is better than bitcoins faucet