Hope it works well, I have a 1500W hotplate and it is useless for 12 litre decoctions - on max power the thermostat keeps cutting out even though it's nowhere near boiling - may be OK for ~ 5 litres or so.
My mashes require a full decoction (80% of mash - all bar the enzyme liquid off the top), I use a 2400W immersion element and it works fine and can bring 12 litres of mash up at 2C per minute all without leaving the mash tun. Only ever get scorching if the mash is gummy (excess beta glucans), one reason I have stopped using buckwheat.