We could all do worse than take his advice, IMO, though there are some that don't like him...Mostly those who he's exposed as shams and rip-off merchants hiding behind marketing technobabble.
If you ignore the hyperbole then he's quite good, and we certainly could do worse than take his advice - he has been very good at publicising some imporant points.
My only irritation with him, which is, as far as I can tell, quite widely shared, is that he comes across as a shameless self-promoter with an apparent inability to recognise the work of others. That's probably why there's a fair bit of antipathy towards him; it isn't his advice, per se, rather the way in which he gives it.