For the money you can't beat this offer. I bought this to build a 10x16 pitched roof and it has held up well, very likely I will never use it again so price and quality balance is key here. Overall the quality is better than expected! For myself I changed the trigger to sequential mode, I had a lot of double positives with a red trigger. The good news is that I didn't have a single misfire for about 2.5 squares! The shell is plastic and at first I was afraid it would tear when making this roof in 30 degree weather, but oddly enough, even after sliding the roof off a few times, there has never been a single tear or failure! It's a little cheap, but it's $100. My roof has a 10/12 pitch and when adjusting to that pitch, the angle guide didn't go far enough that the heads weren't nailed perfectly perpendicular. It may need another inch on the bottom adjustment bar to get it right. For myself I just raised it up a bit to allow the nails to be flush with the pebbles.