First, to say that I am a novice DIYer would be an understatement. I never used a caulk gun before, and at first I thought I ordered the wrong size caulk gun because the tube didn't seem to fit into it But if you pull the silver lever back all the way, you should not have a problem. So now that I figured out how to use it (thanks to youtube videos), it's pretty simple, and as far as I can tell, ergonomically correct.
Rating: [5 of 5 Stars!]