I was skeptical due to some bad reviews seen online. The technician from GleamGuard came over and did a free test door that I was impressed with. I had a lot of grease buildup as my cupboards are 36 years old. The Zep heavy duty degreaser they used worked great. I have taken before and after pictures which are posted here. The technician promised they would not be perfect due to their age, but the cupboards actually look like new. The job was done the same day as the quote and so I received a large scheduling discount for having it done right away. I would highly recommend GleamGuard to anyone looking for an improvement in their kitchen cupboards. I recommend checking out their website for other before and after pictures. The technician will come to give a free test door and give a free quote.