I have been using the MD Needle pen for about 2 months now and it has been flawless. The results are exactly what I wanted. There is not a better priced high quality microneedling pen available. We could not be more pleased with the MD Needle Pen. It's safe, effective, sterile and durable. Our patients are seeing the results we would expect from this product. The customer service we have received has been exceptional from day one. I highly recommend this tool for Microneedling procedures. Using the MD Needle Pen with PRP - great results. Thanks! Everything in the product literature and on line is as described and we have been very happy with the durability of the MD Needle Pen and the disposable costs. Easy to use and charge. Completely sterile with tips. I love that you can control the depth of the needling. Works wonders on wrinkles, scars and stretch marks.