[tryitnow]

That's the problem with hiring any professional, you've got to do the homework yourself to (1) be able to communicate effectively with the professional and (2) make sure the advice you're getting makes sense.

This is true for all professions, doctor, lawyers, accountants, etc.

[chuinard]

Doesn't Yelp for doctors, lawyers, accountants, etc solve this problem?

[tempestn]

My sarcasm detector may be broken, but in short, no. Even a "good" professional can give bad advice. I love my accountant, but I still catch things he's missed occasionally. (And he catches things I've missed more often.) It's a partnership. Unless you're a mega-corp with in-house professionals, you're always going to know your business better than your accountant/lawyer/etc., and you're always going to care at least somewhat more than them too.