I've yet to try Coopers, but I've begun diddling around with another LME kit.
I've got one 5 gallon batch going right now, but it'll be another month before I'll be able to give a report on anything.
I'm using one 2.2 pound (1 Kilo) can of Light Premier Malt Extract (hopped LME), no sugar, and two pounds of Muntons Extra Light DME, plus the Lager yeast that came with the kit (I KNOW...!?!).
Next week I'm intending to start another 5 gallon batch using ONLY water, two cans of the Premier LME, and yeast!
If anyone has done this, or any other kind of variations, before...I'd be interested to hear how things turned out.