The terms and conditions are simple but restrictive - only slots count towards the required wagering and only a small number of machines are excluded. In order to receive the bonus you must make your deposit using a debit or credit card, there may be a couple of other methods permitted however Skrill, Neteller, Paysafecard and UKash are all definitely off the table. Interestingly there is no mention of a maximum permitted betsize whilst a bonus is in play which might make this particular deal attractive to some advantage players.
I'm fairly neutral about this bonus on the whole, I appreciate the fact you can play Dead or Alive with the funds although with 70x the bonus of wagering to complete there is no doubt this is a negative expected return bonus overall and the fact you have to use a card to make the qualifying deposit even though the maximum bonus amount is capped at just £25 seems ridiculous to me! If I was going to make a deposit of £100 or more and settle in for a full nights session I would probably take the bonus money as I feel reasonably sure I would complete the wagering requirement long before I might think of requesting a withdrawal, however low rollers might want to think carefully before tying their money in to this offer as it would be extremely unlikely for any player depositing £10 and playing small betsizes to have any chance of chewing their way through the huge level of required betting.