AskGamblers sadly do not have the bonuses listed as 1st, 2nd, 3rd deposit etc so be aware that you cannot choose your bonus based on your favourite game from the five offered and must take the different offers in the order specified by the casino.
My big problem with this bonus is the confusing terms and conditions. This isn't so surprising though when you remember that Spinzilla is operated by 888 (otherwise known as Cassava) who are well known for pulling such tricks. Specifically the casino states that you play first with your real cash funds, and gives the impression that if you are lucky and win before you have started playing with the bonus funds you will be able to withdraw your balance provided you forfeit the bonus - this is a great bonus strategy used by high quality casinos such as Bet.AT, but in my experience that is NOT how this bonus actually works and there is no way to withdraw your balance until you have completed the wagering requirements.
What a wagering requirement it is too, on a 100% bonus at 50x deposit plus bonus that is of course effectively 100x the bonus - deposit the minimum £10 and you have £2,000 to wager. Go for the maximum £100 and that becomes £20,000. Obviously your going to need to be VERY lucky to end up withdrawing anything from such a bonus, so only accept this deal if you value extra playtime over the chance of making a profit... personally I gamble for fun, but it really isn't much fun if I know I've lost my money before I even spin the reels.
Also be aware that if you run into any difficulties at this casino, no third party will be able to assist you in getting paid anything you are due as they refuse to discuss player issues with outside agencies.