I just bought the Toddy system and made some coffee yesterday. I bought Allegro Ethiopian Harrar beans at Whole Foods, ground them in my burr grinder set to about half-way between drip and french press (IOW, about 3/4 of the way towards the coarsest setting) and followed the directions carefully, making the appropriate adjustments for the fact that I had 12 oz of beans, not a pound. I'd never tried that particular coffee before.
The beans smelled good coming out of the grinder, but the end result was very disappointing. The concentrate had that sour smell and taste that coffee gets when it's been sitting around on the hot plate too long. I made hot coffee with it and, of course, once I added some water to it and then some milk, the sour taste was diluted, along with all the other tastes.
Do you think it was a problem of technique or the coffee used?
I rarely make coffee at home, just because I enjoy my 20 minutes all by myself in Starbucks (yeah, yeah, I know. I don't care. I like it.) with my latte every morning, so I've never really settled on a favorite coffee. The convenience for hot or iced and the low acidity/rich body promised by Toddy sounded so good. I hate to have to abandon the idea.