love this shampoo. This Sunday shampoo is a great name because really you only need to use it one or two times a week! I use it once a week in place of my bumble and bumble thickening shampoo. This chelating or clarifying shampoo really rids the residue of any wax or paste you use in the hair. I think it makes an awesome mens shampoo. Especially for the men who love to use sumo and wax in the hair to make it stand on ends. I highly recommend this shampoo if you also use a lot of hairspray. It will completely rid any build up you have on the hair. I use it and then do a 2nd shampoo and leave it on the hair for a few minutes. This works like a charm also on hair that is on the fine side. It really helps give the hair a lift with more volume. Again, use this a couple times a week and your hair will never have felt cleaner! Love the whole bumble and bumble line. It is a must for everyones shower!