Degussa gold savings plan

I saw that Degussa offers a gold savings plan and was wondering if anyone here has had experience with it. The principle is probably like this: You save a chosen amount each month for a certain amount of gold (e.g. 1 oz). As soon as the corresponding value has been reached, you can have the gold physically delivered or continue to be kept in safe custody. As far as I understand it, 0.5% custody fees are charged during the savings phase. Does anyone here have this?