I hope all users of these products are also wearing SUN BLOCK as well! Many people by Hydroquinine products from local supermarkets here in the UK, and they suffer badly as there is no medical advice. They walk the streets wearing these creams without sun block - expecting GREAT RESULTS?! It not going to happen. There's nothing wrong with Hydroquinine itself. It's having the right medical advice and support to use other products alongside it that will compliment the results to your skin.
OBAGI have a GRREAT range of products. But, you have to go to see a Private Surgeon/Dermatologist for this. It's costly too!