I signed up and made a deposit of 20eur and entered the bonus code while depositing. I received my 20eur welcome bonus right away. The bonus had 50x wagering which is a bit high but still bearable. I had 40eur balance and 1000eur wagering to meet so I definitely needed some luck to beat the wagering. One thing I wasn't a fan of was that there were no specific games listed as restricted. In the bonus terms it said that all the games in casino section could be played and slots would could 100% for wagering. I wanted to clarify this with the casinos' support team however their live support wasn't available so I decided to risk and choose games I thought should be ok to play with active bonus.
From their game selection I chose to start off with Mustang Gold, which is a game I quite enjoy. I played with minimum bets as my balance wasn't high yet soon enough I got the bonus round and managed to win around 100x bet win and when my balance was at 60eur, I decided to move on. The next game I played was Book of Oz, which is a game I know has decent potential. Unfortunately, the game was completely dry, with minimum bets it took my balance in less than an hour.
So far I've managed to claim my free spins twice, they were credited on Crazy Monkey slot. I didn't manage to win anything over 2eur and lost them on the same slot.
All in all, I think Betmaster is a decent casino and they have a very good game selection. With that being said, it's not the best bonus I've seen, I prefer bonuses with 40x wagering and I disliked the fact that I couldn't find a specific restricted games list, if there was one. Also I would have liked if the support had longer working hours, if not 24/7.