[1 of 1 customers found this review helpful]
I PURCHASED THIS MARES PROTON OCTO AND THE MARES PROTON ICE JAN/2006. I HAVE USED IT ABOUT 20 TIMES. I USED SEVERAL OTHER BRANDS AND I HAVE ENJOYED THIS THE MOST,IT'S JUST AS GOOD AS THE PRIMARY REGULATOR,IT'S COMPACT AND WELL BALANCED,COMFORTABLE AND AFFORDABLE.