I love my adhesive applicator Gun. It's a little bulky but it is worth the money, Great for chipboard, metal, cardstock and pictures. However hard to use in small areas.
I recommend this if you work with lots of mini book, because it will keep everything in place. The first time a saw this gun was when I went to my framing store. I ask the person who was using it if this was a good tool and he said " is great and the tape is acid Free.
Requires a little practice, but after you get use to it, you are going to love it.