Really hand finish/brad nailer for DIYers and even pros, the time it saves is worth the money.. No hose and air compresser needed! If you have a lot of trim to hang or some light work to do to, this saves you a lot of time with finishing nails, especially the thinner gauge that like to bend. I used this most recently while redoing the doors (used on trim, not doors) inside the house and it cut my drill/hammer and nail time down by 75% or so. I reused the old brittle trim on the doors and this gun/nails didn't fray or crack it. Even on angled trim, if I held the gun parellel to the wall, it countersunk the nail (see picture). The only time I had an issue with the nail not countersinking properly was when I was not holding the nail gun down hard enough at the end of the drive and if I press the top of it (the air vent) to my chest then it couldn't "breathe" right.
The directions are not the best but it is easy to use after watching a quick video on the internet. You can adjust the drive depth and air pressure which is great. I keep the power on the highest level and the countersink at the deepest. Clearing jams (which I havent had) can be done by loosening a simple latch near where it nails. The nail gun is not too heavy and the battery will last a long time. You can use 16 nails from 3/4" to 2.5". Although battery powered, the nail gun still uses air. The only downside to this tool is you have to wait a second between each nail. The light on the nail gun is an added feature for dark spots. Tool belt hook is nice as well although you probably wont be hanging it unless you are going up a ladder. Battery lasts for several hundred nails and switching nail sizes is pretty easy.