Re: Coconaras or Cocobricos??
I haven't had Coconaras, but I bought a box of Cocobricos back from Germany when I was there. The problem I have with Cocobricos is that they take a long time to light and if you place them on the bowl before they're 100% lit, the side touching the foil will stop glowing and get cold. I've been using a gas stove to light mine, so it's been a pain, but if you have an electric coil burner you should be fine.
They produce no odor when lighting them, but I have gotten some coal-like flavor before like 3/4 of the way through the session. I don't know if that was just my box of coals because everybody else thinks they're good coals.
However, seeing that they're extremely cheap, they're more than worth the money you pay for them. They're very decent coals!