I'm going for the third time in December and I will never ever tire of it.
Seriously, it is the best Theatre production you are ever likely to see.
I have the songs on my Ipod, even my Fiance who is into crap like Aphex Twin and stuff loves it.
The first time I went when I was 16 just after I left school, I loved it!
2nd time was this year, back in July. I surprised my Fiance by taking him to London for the weekend for his birthday. Booked a few things in advance, Madame Tussauds, Hotel, theatre etc. He was ready to go straight back in and watch it all over again! He then told me that when I'd given him the tickets he was thinking "What the **** do I want to see that for" but now it's the best ever lol.
I've heard it's finishing this Christmas which is why we're going again.