Those G-T blades are all over the place in terms of how good they are. They are not as consistent as white II or I steel blades, but there are folks who are happy with them. I had two of the entry level irons (which cost me an extra $50 each on a plane order) and the two I got were not as good as the stock O1 irons that steve offered (actually, steve's O1 irons were very well done).
But, i know several folks have vouched for them (steve did mention he had a fair number of returns from customers for having chip prone irons).