What got me playing with Tsars is good deposit bonuses. Even though i ripped most of them, it's still nice to be offered a deposit bonus with normal wagering requirement (10-20x - depends on your level) and no special withdrawal limits. I'm with them for almost two years and play regularly. So far happy... VIP team could do more for me but that's something players would always complain.
So far my journay has been ok. From the first deposit bonus, verification, withdrawal... all goes OK. Now withdrawal is approved ASAP - only SEPA is bad.
The website design is clean and nice. Offers good filtration by providers. Same goes for PC and mobile version of the website.
Overall ... i do recommend Tsars as a good and reliable casino which is also safe to use. Overall, don't recommend to start gambling to anyone :)

If you check positives and negatives it says all. I do recommend ZenCasino as i had no major problems with it. It did get stuck with one withdrawal when i had to reverify my credit card - which i had 0 idea why, but it all worked out fine. As i'm playing with them for quite some time, i dont have any issues i could find. Deposits are fast and without extra charge. Withdrawal option i use is direct to card and is now very fast (few hours). It's ok for me, currently. Could have a bit more live support and that live support could be nicer as they are direct and dont give a damn about what u think :) but they try to help if they seem help is needed.
Anyhow, i do recommend it to anyone trying online casinos.