I have old bad knees and after researching knee pads decided to give these a try. They fit good, although I did get a blister on the inside of my left knee which could just be the way my knee sits in the cup. Easy to crawl around on with a little practice, both forward and backwards. I wore them for about 5 days on a project from 3 to 8 hrs a day and my knees did great. A couple of points I'd like to make on them, first one is that they are bulky feeling and looking if you are walking in them. They tend to bang up walls or doors in narrow passageways as you walk through if you are not careful. Also if you did like I did and went from the floor to walking up a ladder the front of the pad will catch on the ladder rung as you climb. The first time it caught me off guard and dumped me back on the floor. After that if I payed attention it was no problem to climb up or down a ladder. Overall I think they are great and look forward to them lasting me for quite some time since I don't use them on a daily basis like many in the trades will.
Rating: [4 of 5 Stars!]