I had G Forms and hated them. I found they didn’t conform to my knees at all. I have had a couple pair of POC and they really fit well on my large legs. I recently got a pair of Scott Soldier II knee pads and had to size down to medium so they do fit big. They are amazingly comfortable and cool (for knee pads) even on long rides. What I did was go to all the LBSs and try on as many pads as possible.