Just because it's generally accepted as a good product, doesn't mean that everybody will like it. That doesn't mean they are hateful and bored with life, they may just be giving an honest review.
I just thought the bad nutraplanet ratings were disproportionately high compared to the overwhelming positive feedback on this board. It wouldn't be the first time reps from other companies have tried to talk down a good product.
This has been hit on, but I will confirm what everyone else is saying....you can't trust reviews on NP. I've seen it as a rep for SPP and now Evomuse, we've had products get 1 star reviews (as have other companies) before they are even released to the public. I can write a review on any product right now on NP even if I've never purchased it. So if I'm someone who has a vested interest in a product doing poorly of course I can get on there and bash it left and right. That doesn't mean the reviews on there on Enhanced are fake, but you can't know for sure even when reviews are good. Some companies in particular (not going to name names lol) seem to positive bomb NP with 5 star reviews. Bunch of 5 star reviews posted at similar times in similar manners.
NP for as good a site it is has a really poor review system. I'd take much of what you see on there in terms of stars with a grain of salt. And I'd be very wary of the reviews on there, even if they are positive ones. You're much better off looking for logs or looking for customer feedback over a variety of boards (google search).