Robert,
Yes, it is strong, but I have not really found a good use for it in the typical model construction. I used it when it first came onto the market, but the frustration issues of the expansion characteristics made me go back to the old school methods of gluing. The best use I found was installing hinges, but the expansion into the barrel of the hinge was a real pain to deal with. I do use it all the time around the house to repair furniture, flooring ,etc. It is very strong and good for gap filling, but not for models (for me anyway).
Paul