Ive done a few brews recently and they have come out not so good. Its always a punkish type beer or a plain ipa with a bit of hops. I couldnt describe the flavour but i knew it was off. Then last night i tried a bottle of extract kit home brew(probably a mango jacks) from a friend. That is the taste!!! The off taste im getting is exactly like an exctract kit!! How does that happen ? Could it be down to fermenting temps ??