One of the above answers is a bit biased, (although the other one is not).
"Worth it" is a subjective thing there is no promise that you will find something not available elsewhere by using google to search. I would hope (and we try) to ensure that there is and everyone makes at least £28 more than they would have done otherwise. But you might not.
Andy is a very modest man and is underselling himself, £28 is not a lot of money in the grander scheme of things and you will learn at least £28 worth in experience alone by reading some of the fantastic and insightful threads here.
So I would say yes, it is.
Re: Wikileaks- In a free society, we are supposed to know the truth. In a society where truth becomes treason, we are in big trouble. - Ron Paul
I am a fan of MSE - I think it's a fantastic place to learn MBing (altho I sometimes wish it was private because of all the lurkers on there). 99% of the stuff on here is on MSE, apart from the casino stuff.
Having said that, the chat box alone on here is worth £28 - and I have made a lot more than that from tips on there. Plus the casino bagging encouragement is great. And there is definitely some more advanced stuff on here, especially for those who understand the maths (or in my case SOME of the maths) of EV+. :P
PS What was the Jetbull advice? I haven't done them yet!