I made a 20€ deposit with my credit card and received 40€ bonus. I had nice balance of 60€ and had to wager 2000€.I started to play The Dark Knight Rises with minimum bets. Very soon I received free spins which paid me around 10 x bet. Then I had some very mediocre winnings, I made around 150 spins and my balance was down to 30€ and the free spins amount was up to 37 spins with 2 x multiplier, so when I finally played the 37 Bane spins with 2 x multiplier, I won almost 10€ and I guess I was hoping for a bigger win with so many free spins.
Then I went to Immortal Romance. I played with minimum bets because I know that Immortal Romance likes to be greedy. I played around 50 spins and reached free spins round. Amber gave me only 2€ win, not even 10 x bet. I played Immortal Romance for the rest of my evening, my balance went up and down, my biggest winning was 20€ on the main game. I triggered a few bonus rounds but they paid around 10 x bet, not more even once. I also got Wild Desire twice but it was such disappointment, both times I won 0€! Eventually my balance reached 0.
Overall I think this is a very nice bonus from Hotstripe casino. There are nice game selection, however, I would like to see more games from Microgaming, like Game of Thrones and MG new slots. Wagering requirements are quite decent so I do recommend to take this bonus.