Years ago I bought a used unloved WAGNER Glue-Matic 3304 Made In Germany as a cheap backup.
It outlasted and outperformed everything, and I haven't needed a second glue gun, because it just works every time.
That said, I noticed not all glue sticks behave the same, and upon recommendation tried a box of Bosch badged glue sticks/rods,
that for me have worked great, and still have a few to go. It's a winner combo and I won't use or try anything else, till either or both fail.
Not sure if the WAGNER Glue-Matic 3304 is still available, but others like the DeWalt (B+D) look similar-ish,
and better be good for the big dollars they want for MIC re-badged generic products
A good glue gun with quality glue sticks and clean prepped surface saves time,
and does ok for non critical isolation and component hold downs,
just watch out the lava hot glue doesn't trash the component/s
fwiw I don't leave mine powered on till I'm sure it's going to be used, same deal with the soldering department,
all are on a power board/strip with individual switches, and a Master timer to switch the lot off in case I forget.
Keeps the power bill down too..
EDIT: This blue model Steinel Gluematic 3002 looks identical to the black WAGNER 3304 =
www.steinel.de/en/domestic-users/hot-air-gluing/hot-melt-glue-applicators/gluematic-3002-333317.htmlPDF specs and parts list too
www.steinel.net/Customized/uploads/PDFs/GF_3002_Data.pdfI don't think I'll see one downunder, though there may be a re-badge of the Steinel kicking around the tool shops and Bunnings, Mitre 10,
Total Tools, Sydney Tools, Just Tools etc
Found it in .au land >
www.mektronics.com.au/steinel-gluematic3002-glue-gun-200w-box.htmlAccessories
www.mektronics.com.au/power-tools/glue-guns-accessories