schmidty, I'm also returning after a very, very, VERY long absence, so I can relate to that
As far as the glue, it is excellent for assembling and/or attaching small parts. The glue spreads perfectly. As thin as it is, it doesn't run - something I was concerned with before using it. The lid brush applicator is cut just right for applying it to small areas. It sets quickly too, so you don't have to hold those tiny parts in place for more than a couple seconds. And, I've used it a bunch of times now, and the level in the bottle has barely moved. For larger surfaces, and where you need a weld seam or squeeze out, like a fuselage, this ain't for that - well, I wouldn't use it for that. I use Testors stuff in the plastic bottle with the metal tube for larger surfaces, and I use the stuff in the tube in critical areas where I need a particularly strong and permanent joint
I discovered this on my own. I had a bottle of this stuff but wasn't using it. I was just using the Testors liquid and was getting into a habit with that. I didn't like how much squeeze out I was getting when I started attaching some small parts though, so I decided to try the Tamiya extra thin and was amazed at how easily and cleanly they went on. I even had a couple delicate grab handles that broke in half which I used the extra thin to repair, and It fixed them easily. There was a visible seam where the handles broke, so I brush some extra thin across them, and after it dried the seams went away
I notice you like doing 1/72 AC - which is super cool btw - so I highly recommend trying this stuff if you haven't. I could see it being a huge help with things like cockpit details, rigging, pitot tubes, gun tubes, etc