Has anybody used these?

I'm going up in June and I was planning on renting crampons. Then my buddy got these on steepandcheap.com for $65. I was paying $45 for the three days on Whitney, not to mention the rental to practice/learn beforehand. I watched the site for the last two days and just got the ten point ones today, same price!!

Can't find any reviews online.

Thanks,
John


"In every walk with nature one receives far more than he seeks"...John Muir