Decks, Patios, Porches and Docks - Hidden deck fasteners

Got my deck fame up and the project is going swimmingly. :) I am now looking for a good under mounting system to attach my deck boards with. I am using just green treated 5/4 deck boards so I would like to put them as tight as I can because they will shrink . Joists are 16" O.C. I have been looking at several systems and the cost seams to be pretty much the same. (around $300 for my deck size, 336 sq. ft.)
Here is what I found so far. If you have any experience with any of these systems, let me know what you think of them. Are they easy to install? Do they hold well? Anything else you can think of?

Here is what I found so far:

http://www.aphanofasteners.com/ <--- cheapest but labor intensive.
http://www.deckfastener.com/ <-- looks good but I wonder when the boards shrink.
http://www.invisifast.com/ <--- seams pretty good have to attach from bottom
http://www.ipeclip.com/ <--- have to slot each board, wide spacing

Any suggestions and links would be helpfully.

I am currently installing invisifast angle fasteners. I am laying down a herringbone pattern and using trex boards so my spacing is 1/4 inch. I think the product is working great so far everything is solid and if I ever need to replace a board it will be easy.