I do not have an ATG gun, but i have used one many times. If you are planning on getting one, I personally like the smaller tape size. I think there are 2 sizes of tape. I feel that the smaller one gives you more flexibility of use whereas I am only comfortable using the bigger sized gun with bigger projects. I don't like them to use for everyday scrapbooking because there is no room for error at all. Once something it taped down, it ain't moving without ripping. IT is great for chipboard, but I also found that the Glueglider Pro is an excellent middle ground and still great for everyday scrapbooking. If you do a lot of projects, i would say go with the ATG.