Is it possible to win on that website? Any of you guys has some experience?
Of course, why not

bustabit has been in business for a very long time, if there was any problem (no payout, nobody wins, ...) it would have been discovered immediately and they would have had to close down. But this is not the case, the site still exists and has dozens of (happy) customers every day.
You can also inform yourself about casinos at @efialtis site
btcgosu.com. He reviews them and writes field reports about them. You would also know immediately about scam accusations or problems.