I bought a DeWalt nail gun near the end of last year. Since then I've driven several boxes of nails with it, mostly without any hitches. I've used it nearly every day for building cabinets and installing mouldings. This is my third brad nailer. My first one was a Senco SLP20, a fabulous gun. I never had any problems with the Senco other than the safty being on the front side of the driver... that made it difficult to shoot nails at a bit of an angle if needed. My only other complaint about the Senco was its limited capacity in length of nails, 1 5/8". After the Senco was stolen out of the back of my truck I bought a Hatachi brad nailer... the DeWalt was not yet on the market. Overall, the Hatachi was a nice quality gun and had the 2" nail depth capacity I really needed for my work. However, it would often double fire on me because the safty was so sensitive. This problem occurred so much I finally gave it to my son (a weekend warrior) after the DeWalt came on the market. I was real excited about the new DeWalt brad nailer because of the nice features, particularly the design which put the safty behind the driver. It worked flawlessly right out of the box and I almost never looked back. At the time I was looking at the DeWalt gun I was also considering the new Senco gun that shot 2" nails.
Now after about six months I'm beginning to think I made a mistake buying the DeWalt. A recent problem has occurred that's quite troubling: The gun stopped firing and recycling properly. I thought maybe at first it was due to a blown O-ring or something like that. The only way I could get the cylendar to return was to uncouple the air hose. Then, I could shoot one nail before having to uncouple the hose again. Needless to say this was a pain in the rear. Another son, who is also in construction, told me he encountered the same propblem with his DeWalt brad nailer... which was even newer than mine. He was finally able to get his to work by adding oil to the driver and guide after opening up the quick release mechanism. I tried this, but used a super thin lubricant instead of the oil that came with the gun. It didn't work. Later I went back and it fired fine for about 10 shots and then stopped again. I've let it set for a couple of days now and just tried it again. It seems to work fine now, but obviously I'm concerned because I don't feel I can rely on it when doing a job on site... and that could really cost me time and money. So, I'm once again thinking hard about buying yet another brad nailer, the newly designed Senco 2" gun. I've really liked the DeWalt, but am concerned about it's relyability. I'm also put off because it may be necessary to buy a third nail gun in less than two years... this is getting expensive.