I'm with hikermor. The reviewer seems to have more trouble getting past the two small marks on the scales and the general feel of the "plastic" than he does getting past the fact that the knife opened in his pocket repeatedly.

There are two other reviews on that site. One mentions the scales feeling cheap but is careful to point out that "this perception is deceptive". Neither of the other two reviews mentions any issues with the blade opening unexpectedly.

ETA: I don't own a Grip or a DR1. I have handled both and IMO they are very robust, well engineered folders. I would have no reservations about owning either one.
_________________________
"There is not a man of us who does not at times need a helping hand to be stretched out to him, and then shame upon him who will not stretch out the helping hand to his brother." -Theodore Roosevelt