In the past I've primarily used Testors Liquid Glue. However, it was not hot enough for me and I always had gaps in the weld. I tried Tenax but it left bubbles in the weld that showed as pits when I sanded the seam.
This weekend I tried Ambroid Proweld. It binds quickly and uniformly. However, I have to be careful not to get any on the surface of the model as it seems to craze more easily than Testors.
On a relative scale of hot to less hot, would the order be:
Tenax, Ambroid, Testors?
Any shortcomings of Ambroid I should know about before I fall too much in love with the stuff?