While this nail gun probably isn't up to the sustained use a professional might put it through, it's certtainly a useful addition to the DIYer's tool kit.
It feels sturdy and well put together and, importantly, it feels well balanced in use. The rounded back of the gun allows extra pressure to be applied to the head where needed without feeling uncomfortable.
It is not the most powerful nail gun you'll find, though. When nailing through 20mm soft white wood into pine I found that the nails would remain protruding by between 2 and 4mm. A few taps of a tack-hammer sorted that and the gun certainly saved me a lot of time. It seems that removing the rubber shoe (which is there to prevent marking of softwoods) can result in better penetration, but I opted to use the show to keep the wood in better condition.
For the price this is definitely better than a budget piece of kit and will no doubt be very useful for future projects.