I've used numerous different lifters in the past, but the last two sets I had were the crower's with the hippo oiling. These are excellent lifters. But I do have to upgrade this time to an offset lifter and one that can handle 900 lbs. of open pressure. I have heard the Isky lifters are the best to have in this situation but am skeptical about buying them because they are fairly new on the market. Has any one used these? Good, bad Or indifferent, I kind of would like to know. Also has anyone bought the needleless roller upgrade they offer? Is it worth the money? Seems like a sound investment ,but being new on the market, questions arise.