If you are in the market for a glue gun, I would seriously look into this unit here.
It accepts standard glue sticks.
The unit heats up really quick and gets very hot and because of this, you can keep working with no downtime waiting for the glue to liquify.
I have never had this gun clog on me.
It also features a safety switch to turn it off if it starts to overheat.
Quality - A
Manufacturing - A
Functionality - A