Yep it doesn't work very well but it depends on how you look at it or what are you expecting to happen. I realized in my first induced lucid dream that actually the finger doesn't goes through the palm, but if you look at it with attention you will see that it makes a kind of hole. Of course it depends in each one of us but my results for that reality check where that: It makes a black hole in my hand (scared me a lot, almost wakes me up) and if I see on the other side of the hand it looks like a mountain.

Anyways that's not a reality check that you have to trust a lot because in another dream I had I did the same reality check but the hand where I wanted to do the hole in the palm was closed, so I couldn't see any action. However it's a very good reality check since all you need is your hands. Try along with that RC the one that you look at your hand and find it weird. Check if you have all your fingers.