OMG!!! I couldn’t be happier with this purchase. I’ve had microdermabrasions before that have cost around $99-$150 per session. This facial pen is the price of one session, but with multiple uses. Each cartridge is individually wrapped for one-time use only. Easy-to-follow directions, please make sure to fully charge before using. I used it on my face, stretch marks and scars making sure to follow the depth and needle instructions per each area of skin. It’s painless, but you are able to feel it. It’s totally worth the price for the quality and products you receive.