Jury's out for me - but I do get to find out first hand if its for me or not this year.
Here's how I currently see it:
If you exclude the Monday/Tuesday, that's 120 hours of festival time from Wednesday morning to Sunday night.
I'll be working a total of 24 hours, 3 shifts over those 5 days. That's...20% of the festival period working.
I could afford a ticket, but I'll also enjoy the fact that I'm donating my time to a charity - and I get the rub of doing what I like for the other 80%, and with no ticket cost (so long as I do my shifts).
Granted, some of that time will be asleep....but I still think it's still worth a shot, especially as it's my only way in this year!