Derma Roller - Really good quality and nice to use compared with other rollers I tried, no squeaking when it rolls, looks good and no fear of it damaging my skin. The cleansing spray is nice I also use it for my electric razor. I would say it's a quality product and value is a matter of perspective, there are definitely cheaper alternatives but the quality is good so I can't complain.
The Sidekick - for me it's a multivitamin and nothing more or less, however I hear a beard can be an indicator of a good or bad diet, so maybe it can help if used with a good healthy diet, which mine is for a sports person 🙂.
The activator - not sure what this does, I think it's a nice product to use and in my opinion may help thicken the existing hairs over time or maybe develop the tiny white hairs you have over time (it won't make hairs grow where there aren't any in my experience), my patches remained the same but I can cover them as my hair has thickened which would happen anyway given time . I continue to use this product as I don't notice it on my face and I want to see if it can thicken my hair over two months or develop the white hairs. I know for a fact it won't grow hair on completely bald patches as that's down to genetics, diet, etc.
For me the products are good, however beware of the marketing name "beard growth kit" - it is specifically designed for aiding beard growth but accept the limits your genetics have . I'm glad I tried it out and I think the products are good quality so I will be looking at Copenhagen Grooming for other products, as like my hair on my head needs shampoo and conditioner my beard has benefitted from using products.