My uncle has been a professional body man for going on 30 years, and he's been telling me that the panel adhesives you're talking about work as well as, if not better than, welds. Now, this is all depending on where you are talking about, as in don't think that it will suffice on something like the frame, suspension components, etc. Not trying to sound like I think anyone on here is thinking that way, but I'm in the Army, and you get brainwashed into thinking, if you don't say it, people might not get it. He recommended I use it on our Explorer to replace the rear quarters, as I don't have a welder.
I haven't looked into it yet, but when I do the explorer, I'll let you all know the results, how easy it is to use, etc.
Good post, Brian