Casino Extreme seemingly have a very generous welcome package and you can actually claim this 100% match bonus up to six times as a new player here! Most casino's offer just a single 100% match and some smaller ones or two at the most so they deserve some praise for this(although there is a major caveat - see below). The wagering isn't outrageous either at 15x the deposit plus bonus amount (not 25x as mentioned on this page, confirmed with support 28/08/2016) Also, there is a 30x deposit amount cashout limit which might not be a huge issue if you are depositing £100 or more (depending on how large you like to bet of course, and therefore how likely you are to exceed the limit if you get lucky!), but for players who only like to deposit £10-£20 or so then it might well feel quite restrictive. I guess if you manage to turn £10 into £300 though you should be happy and you could always redeposit and take the bonus again with a larger amount and try for a bigger win!
The software restricts access to games that are not allowed whilst a bonus is in play which is a great feature and really makes a mockery of the supposedly technically advanced multiplatform casino's who are still voiding peoples withdrawals for making bets on prohibited games - if Casino Extreme and RTG can do this then why can't SpinStation (for example)?
One thing that does bother me is the very small list of terms and conditions given specifically on the welcome bonus page. I'm sure the casino believes they have given all of the most important information however there isn't even a link to the main promotional terms which are hidden in amongst the (very) lengthy casino terms and conditions page. It's mostly fairly standard stuff however transparency is very important when gambling on-line and it does make me a little nervous when it appears a casino is hiding information that might result in a players winnings becoming void. I actually got stung by this myself when I signed up as I didn't realize that the bonus funds were not cashable and when my withdrawal came through much smaller than I was expecting I was pointed at these terms and conditions - I understand it was my fault for not having read them in the first place however if there had been a link or even a mention that I should read the full promotional terms before accepting a bonus there is a much higher chance I would have done!
This restriction does make the whole deal much less attractive than it would otherwise be however the bonus money does give you twice as many spins to try and hit a big win, and if you end up losing it you aren't any worse off than you would be had you deposited without taking a bonus.