Is Crystal Tomato A Good Product?

Hi, I have been using hydroquinone 5% with a corticosteroid for 2 months with excellent results. Because hydroquinone cannot be used long term, my dermatologist has recommended maintenance with Demelan or Crystal Tomato cream. I also take the Crystal Tomato supplements as well as Vitamin C once daily. Will these creams maintain the good results? Is Crystal Tomato a good product? Thank you.