Winport is an interesting casino, they offer Mostly Rival slots, with some Parimatch ones thrown in. The games are fair, and I enjoyed playing them for something a bit different. I think despite having 'High Roller' Bonuses, they are geared towards the micro/low stake gamblers, as they seem unable to honor even their very low $2000/week withdrawl limits, reducting withdrawls to a mere $400/week. If you are only looking to withdraw $400 or less, I am sure this is fine, but if you actually play with a reasonable stake, and win a decent amount, don't expect to get fully paid out in a reasonable time frame.
To sum up, if you are looking for something a bit different to the usual fare, and are a small stake gambler, might be worth a look, High rollers should keep on rolling