I firmly believe in the benefits of constructive criticism. Of course, it's nice when balanced with praise. But criticism is good, provided it can be learnt from.
So this review which doesn't simply say the DVD Sea Kayak with Gordon Brown is great, but takes some time to develop critical points is extremely valuable. For example:
"The trip along the coast of Skye was nice and my only criticism was that it was way too short. Clearly, it sets the stage for extra volumes but they should have padded out this one with some gratuitous paddling about in boats."
That's useful information. To be honest, I'm still digesting the idea that someone thought this was 'kayaking porn'.
"To my surprise, it is much more than kayaking porn and actually full of good instruction which encourages you to go out and practice."
I'll take that as a compliment!