I can't quite swing getting a new set right at the moment, so I spent a few hours sharpening them on my stone. I haven't tried them out on ice yet, obviously, but they seem razor sharp. At least they were able to cut my fingers up pretty good.
That means absolutely nothing, believe me... I know first hand!
A couple years ago I decided to sharpen mine, since it was becoming a struggle to drill with, so I went out to the garage and got to sharpenin'! I couldn't wait to get out and give my new razor-blade auger a try, and even drill more than one hole per trip!!
Got to the lake, excited as can be, and grabbed my auger to start drilling. The excitement instantly changed to disgust, while watching my new "razor sharp" blades spin; not even so much as shaving the ice! Didn't even leave a mark, the ice looked untouched! Lol
So I agree with trapperjon on this one!
Since then, I've heard that if you change the angle on the blade AT ALL, even in the slightest, the blades are junk... And by junk, I mean you'd be better off with a soup spoon trying to scoop out a hole!!
I hope this isn't the case with you, but if I were you, I'd try to scrounge up a few bucks for a spare set before I hit the water! It's a heartbreaking kinda feeling lol.