B9 Casino: what to check before a first deposit

About to sign up at B9 Casino for the first time, and honestly I'm a bit nervous about putting real money in before I know what I'm getting into. It holds a Curaçao licence, which is a start, but that doesn't tell me much about how things work day to day.

Looks like it gets a lot of attention in Germany, Brazil, the UK, India and Poland, so I'd guess plenty of you have at least peeked inside. What would you check first as a newcomer: the wagering rules on the welcome offer, withdrawal limits, or the verification process?

Anyone who has played there for a while, what do you wish you'd known before your first deposit? Any small thing that caught you out, like minimum cashout or how fast support replies?