It really is what you make of it. It's definitely not for everyone but no matter how much it's changed you can't really say there's anything like it anywhere else in the UK or anywhere really.
The BBC coverage with Fearne Cotton and lord knows else does take the shine of it now somewhat but then the BBC coverage is only showing the smallest, thinnest slice of what goes on and what it's like.
Some people will go and only watch the big bands at the Pyramid Stage and maybe the Other Stage which is missing the point somewhat imo, whereas others will go, get in the spirit of it, lose themselves for 4 days across the whole site and these will be the people proclaiming it as a life-changing experience I suspect.
As someone else has said, when I see it on the TV always feel a pang of regret that I'm not there but then it's easy to forget the painful bits 
was a great gig though 
