Birth Charts.....

I'm sorry if this is off-topic. How accurate is an astrological birth chart?

I'd like to know this myself. Never coughed up the cash to see "the big picture".

And if one did.. who would they suggest? I've read England's Jonathan Cainer and I like his writing style . He sounds approachable, and writes in a thought provoking manner. If / when I do get my b.c., he'd be my pick.