What are the safest and most reliable sportbooks at the moment?
Safest or should we say those gambling sites legitly offering sports betting
You can find all those sports betting sites
here. You can also read there the feedbacks so you may decide which site will you going to choose.
are there direct opinions of those who have won a lot and have always been paid?
Honestly, I rarely won on sports bet. Whenever I do some parlay bets I lose that is why it is better to stick to sports that you know the most. I always go back to the other games like dice as my luck wasn't that good in sports. Anyhow, I know other players who constantly won in sports. They have a background on each teams they are betting, not only relying on odds but also the team's background and previous performance.