1. Operating a burner without attachments. Works well, the flame is hot, stable, well-bundled and can be adjusted in intensity. Seems to me useful for brazing of smaller workpieces and just as fancy lighter.
2. Operation as a hot air blower, with various attachments, eg for shrinking of sleeves. Is also useful, even if only a temporary solution and suitable for smaller diameters.
3. operation as a soldering iron. This is an absolute last resort, when power is to get at any price. The soldering tip is heated unregulated and is even too hot at the slightest gas supply, overheated and oxidized within a few minutes (if not seconds). If, after every soldering off the burner, then you have afterwards is always a certain warm-up time. Leaving aside the burner, so the tip is tarnished dark blue after one minute and the actual tip is gray, oxidized and can revive only with a special cleaner / activator. So often you can not strip the tip on damp sponge and re-tinning, it is far too hot and oxidized faster than you can see.
4. hot cutting. This feature I find rather pointless. Or I have the sense (yet) understood. If I had to cut 8 hours in the chord nylon cords, then this feature would be useful, but then I would certainly be better off with an electric solution. To trim two nylon cords, I get it with scissors and an ordinary lighter out quite well.
