spinner_shSrBeen reading this board for a while, so here is what I look at before signing up anywhere. After a few bad experiences I stopped trusting the big banners.
First thing is the licence: see which authority is listed in the footer, and if your country is on the allowed list. Next come deposits and withdrawals: card, e-wallets and bank transfer should all be there, and the withdrawal limits need to be written clearly.
The welcome offer is where most people get caught. Wagering of 35x or 40x is normal, and some games count less towards it. A decent independent write-up with the current terms is worth a read here [url=http://jobboard.piasd.org/author/victorabfb2b/]bonus at Wildrobin[/url] so you know what you are signing up for.
I play almost only on my phone, so I check how the lobby works on a small screen. Ask support one simple question first: a real human reply beats a bot loop.
Hope this helps someone. Only play with money you can afford to lose.