I've used this system on many occasions for my clients, and in my opinion as a tradesman I wouldn't go back to screwing or nailing from the top again. This is by far the neatest and easiest way to fix a deck.
Just like your timber flooring inside keep the same beautiful look outside, without the need of ugly nails and screws which split and protrude from your timber deck.
I love the look of my new deck, all our friends comment how good it is, and the best thing for me is I don't have to worry about the kids or their friends getting hurt on nails sticking up like they did on our old deck. Thanks I wish this was around the first time we put a deck down. (Sue Caves Beach)