First off, if anyone is claiming that they have a 100% record with sports bets, they are lying.
In reality, they have likely got lucky with their predictions, with no actual evidence to support their claims.
In general, the best betting advice sites are the ones that:
Provide profitable results;
Have informative betting strategies;
Do their research.
They have specialised in NHL and last season made over 40 units profit.
I hope they bring you as much success as they have me. Happy sports betting!