To say it was "absolutely ****ing useless" would be an understatement. Schools only care about sending you to university, and universities just don't care in general. I had 1 meeting with a uni careers adviser and it was the same regurgitated tat that she'd clearly said to every person she'd seen that day.
TSR is a much better resource for CV help, interview prep & techniques, possible sectors to enter than any careers advice you'll get in schools and i'm not just saying that because i'm part of the team.
Also anyone who is old enough to remember Connexions will surely remember how useless they were! The adviser I had was brilliant on a personal level, but on a career level they did virtually nothing for me.