I am always deeply sceptical of products that make such "miracle cure" type claims. This is just another cream with of the kind of fruit acids that have been put in face exfoliating products for many years. Your local pharmacy will have a selection of much cheaper skin creams for problem feet if you want to try that sort of thing.

If you have significant problems with dry skin buildup on your feet this can directly contribute to causing pain and discomfort, albeit not the kind of pain that CRPS causes. It is especially unpleasant if you have large callouses and/or deep cracks. Rather than mess around yourself trying to remove the skin, you would be best to see a good chiropodist or podiatrist and have the dry skin buildup removed professionally. Normally it is a simple and quick process of having it removed a layer at a time with a scalpel. Only the dead skin is removed so its not painful and there is no risk of bleeding or infection because a podiatrist only removes the dead skin gradually, a layer at a time. When you are there, you can also get professional advice about how best to manage your feet to minimise dry skin build up and any painful cracking, taking into account your CRPS. Often callouses and dry skin build up on feet are caused by uneven pressure caused by your individual biomechanics when walking or by particular shoes. You may find that custom made orthotic insoles create a redistribution of the pressure on your feet as you walk and make quite a difference to some of the callouses and dry skin build up.