The black card works perfectly.
The price is similar (to a penny per capsule).
But coffee is different. Those who prefer "Nespresso" will continue to choose this brand, those who prefer "Black Card" choose one of the many products that this brand offers.
The tastes are very personal but test "Carte Noire" and compare with "Nespresso". In both cases, these are good products, and in my case, more choice at the same price is increase my chances of finding my favorite cafes, some perhaps in "Black Card" , others with "Nespresso".
I enjoyed it, I do not advise you to adopt it but to taste and make your choice. For an intensity 9, I prefer "Black Card", for others the "ristretto", "Nespresso". Where is the problem? Somewhere else ....
PS For what is the ecological aspect, it must be considered from the beginning to the end of the production chain. And "Carte Noire" is involved for many years in terms of coffee production, hence its symbol, the butterfly, because the focus is on protecting the biodiversity of straw at the coffee plantations and, if we want to be sincere environmentalist, then uses rechargeable capsules as Coffeduck 8 black Nespresso compatible capsules less harmful to the environment than Nespresso capsules.