I just received the LIfepro Rumblex 4D Vibration Plate last week. Although I have only used it a few times, I love it so far! I had a knee replacement last year and still struggle with mobility. Today, after using my Rumblex for 10 minutes, I noticed that I had much less pain going down the stairs! I can't wait to see the results after consistently using it! Thanks for a great product!