Did you not use them on the job with me Dean?!
Thought you had.
Well the two secret fixing methods I have used so far ARE
Camo Fasteners
AND
TigerClaw TC1-S Softwood Fastener
For speed I found Camos where faster method of fixing then Tigerclaws.
Also Camos gave me a consistent gap as Tigerclaws depending on how hard you hit the board would vary your gap slightly.
Thing I disliked about Camos is the gap it set between each board and I think is far far to big of a gap for my liking and their is no way to reduce the gap.
The tigerclaws I could get much smaller gaps between the boards which is what I prefer but again it took longer to fit.
Main benefits about the Camos is your able to remove a board if damaged or needed access for some reason later on with ease.
With other secret fixings like tigerclaws its not possible with out cutting the board.
Another benefit of Camo fixings is when you get to the end and you have a trapped board between posts Tiger claws and groove fixings require you to have space to slide the board into the fixing Camo fixings you can cut your board neatly and drop it from the top straight in.
This might not be as big of a problem for you Americans as you fit your newel posts after you fitted your decking boards but in UK and I think rest of Europe we fit the newel posts first bolted to the joists.
I wouldnt use TigerClaw TC1-S Softwood Fastener again my self mainly because
1. Not as quick as I thought!
2. Inconsistant gaps so again slows you down.
3. You can't slide the board left or right once the spikes have located thats IT so if you have two boards joining to make a full length you can end up with a slight gap between the two. IF you doing fancy mitres or running boards difference directions or notched a board around a post you got to make sure when you start knocking the board into the tigerclaw spikes that its in the correct place as their is no moving it into position after
4. You need space to knock the board in which is rubbish when you have a trapped board (between posts)
I will be using the Camo fixings again but only for standard decking where the client would be happy face fixing the decking but I would never do that as would insist on Camo fixings.
Reasons
1. Gaps little to big
2. You can just see the fixings holes so its more of a discreet fixing method than secret
I my self next time on a higher end quality decking would go for router or biscuit jointer method Or get pre grooved boards and use fixings which fixed grooved boards like ones already mentioned.
I did think of the TigerClaw TC4-S Stainless Steel Ironwood & IPE Fastener
http://www.deckbrokers.co.uk/index.php?route=product/product&path=42&product_id=97
BUT even though these ones might give me a smaller gaps over the other ones which fix grooved boards from above and you can get to them at all times
these TigerClaw TC4-S fixings would not allow me to remove a board in the future easily if required because you screw from an angle and wont be able to get to the screw.
JMB