I had a couple of coopers Canadian blond last night after bottling a couple of weeks ago. Absolutely lovely.
One can, plus 500g of dme boiled for 15 minutes with some progress hops(40g I think) It is supposed to be 1kg enhancer but I wanted a session guzzler for the long festive drinking days.
Very nice I have to say. No trace of twang at all. I done the same kit recently as per the instructions and there was a definite twang to it.
I've always found though that adding hops to kits, either as above, dry hopping or hop teas do get rid of the twang and make a really nice beer.