The product works well. The tube is too flexible, when you start a tube it is difficult to apply until your more than 1/2 empty. The only cure was to wrap the tube with duct tape before putting in the caulking gun.
Larger birds such as pigeons are definitely put off by this gel, but effect is temporary. Stuff is messy and takes a little practice to get the application down. Does not repel smaller birds at all. Has some effect on keeping the squirrels away.