Been three times and it's alright for a tenner.
First time I went we nicked a bar of soap from the baths and planted it in a family friends bathroom (United fan) - this went unnoticed until we mentioned it a few weeks later. She was mortified that she'd been sharing a bar of soap with Stan Collymore.
Dad's a teacher, 5/6 years ago, if you asked to borrow a pen in one of his classes you got the speech about how "I will want this back, it's Gerard Houllier's pen"...another steal!
Went again last Autumn with my former partner, the bloke who was doing it was alright really - kept up some good banter for the kids, whilst not 'dumbing it down' so much as to make it dull for the older people present.
You can't beat having a look at the trophies and memorabilia, as well as the sign and the dugout.
Even if you don't fancy it so much yourself, take your kids.