I tested the balls Lenor Unstoppables perfume Air. I'm really happy with this produit.il gives a good smell the laundry and it's very nice to get it out of the enclosure front a few weeks after washing and still feel fresh. I think being able to without. The only negative, which is rather the practical side and not on the quality of the product is that there are more and more things to add in the drum of the washing machine (cloth anti fading, laundry, stain remover, perfume, softening, ...). It might be interesting to combine products to have less to store and less things you have to think at the time of the machine.