The thing is for me that although I like Issey as a fragrance more than Aqua, it has a lot of siliage. One time a woman smelled me through a screen window a few yards away. She liked it but it was a bit much I think. I think I had on 5 sprays, and it was hot and I was in a laundrimat (sp). That said, it does die on me pretty fast. I really like the fragrance though... I just don't wear it. I find the fragrance rather frosty and refreshing ... a better name for it would have been Himalaya IMHO. I think Pure Cedrat and Aquaman are related fragrance if you want to try them out. I know Aquaman was created by the same perfumer. As usual I will refer you to my friend scentemental who might be better able to give you a comparison between Aquaman and Issey.
I like aquatics (on the whole) and Aqua is no exception. This one has better duration than most. It is more closely related to Issey Bleue and Erolfa than something like Unbound or Aqua di Gio. I find it has more of a marine feel to it than fruity/herbal/melon notes. It lingers pretty close to the skin for most of the day. Still the duration is great (on me at least). This is one where my wife never fails to compliment me on what I'm wearing at the end of the day... and by that time I can hardly smell it at all! Good all around utility player for me, but it isn't a fragrance I find to be stunning.