Been reading this board for a while, thought I would drop my short checklist for choosing a casino site. After getting burned once or twice I stopped going by ads alone.
I always start with licensing: find the licence number and look it up, and whether they actually accept players from your country. Next come deposits and withdrawals: card, e-wallets and bank transfer should all be there, and cashout times should be listed up front.
The welcome offer is where most people get caught. Anything above 40x rollover is a red flag for me, and some games count less towards it. A good recent review that covers all of this is here bonus su Slotshopper and it saved me some time.
I play almost only on my phone, and if there is an app I make sure it comes from the official page. Ask support one simple question first: slow or scripted answers usually mean trouble later.
Hope this helps someone. Treat it as entertainment, not income.