IB parents , please share your view on IB!

IB is a trend on inter'l sch ,private and DSS sch, but I was told that IB students have to study six subjects including science and mat. If someone is not good at science, like me, it is hard to pass not to mention high grades. And students really need to get very high marks in IB exam to get into a famous U overseas.
Is it the truth Please share!