BetUS - I do not personally use (yet) - but all reports are they are solid. New management has turned the place around and will pay - they may give a bit of a run around with verification before they pay - but they pay.
Jazz - again, not active there. More of a mixed bag of reports. They pay - but again can be a tad trying at times with their verifications. Complaints of players being limited and winning in casino and then being told it was a system issue. Take those for what they are worth - clearly if someone walks into a casino - plays $50 a hand BJ and claims to walk away 3 days later with 50k - something is wrong. I’d feel safe playing there and the bonus was right - but unless you’re getting something there an A book can’t give you - I’d stick to safer options. To me they are a solid B level book - well established brand and won’t be going anywhere anytime soon and remains responsive to legit issues.
Again - common sense with any book - no need to treat them like a bank - keep what you need to in them and if the deal is too good to be true - it likely is. Both are well established brands and aren’t going to stiff a couple of players over 500 dollar deposits. End of day they pay - but can be sensitive to winning new players - especially those who show signs of being too sharp.