Hi WiZeR,
Yup, that's the chap I got, noisy little begger when it's running, but it fills the reciever and shuts up pretty quickly and having never used a nail gun before I am finding it extremely useful! It's not heavy either, so I don't think twice about lugging it around to wherever the job needs to be done.
The only problem I've had (and to be honest, this isn't really a problem) is that the one time it mis-fed a nail and jammed, it's a bit of a faff to get the cover off and remove the bent nail - not difficult or anything, but it takes a couple of minutes with allen keys to get it done. Mind you, having no experience of other nailers, this could be common to them all, I wouldn't know!
I built a small area of decking in the corner of the garden (roughly 2-3 metres on a side) and I used the nailgun to get the frame together before screwing it, then hold the joists in place before screwing them, hold the noggins in place before screwing them, then hold the deckboards in place before screwing them down - if you see what I mean.
I am deeply paranoid about the structural integrity of things (probably something to do with going to 'Brunel' university!) and tend to grossly over-engineer things, but I don't believe that 18ga nails alone would have held it together. Bigger nails as mentioned by the other gentlemen in this thread may be altogether better if going for a screwless option.
Having used a nailgun now I can't imagine tackling a project without it, the ability to pop a nail in precisely wherever you want with one hand is fantastic, even if you're just tacking something temporarily in place.
V.