I'm not a woman, I'll leave it to you to decide whether that matters for knee pads.
I tried out POCs for a couple rides, owned Fox Launch Pros, and now have Dainese trail skins. The Daineses are the only ones I've actually kept wearing every ride, even in hot weather. Decent coverage -- not DH-worthy, but the right compromise for me. I've crash tested them a lot recently and they've done great and are showing little wear. (I know I sound like a sales rep; I'm not). A downside: hard to find shorts long enough keep your above-the-knees covered when you ride.
I haven't used the Leatt pads, so I can't compare them. Looking at them, I'd be concerned that they would be hot enough that I'd end up not wearing them on warm days. Airflow.