I have just started a roll of the black filament. Seems OK to me so far. I haven't done any real testing to check if it is hugely different from the regular stuff. The odor is equivalent to PLA, which is "mild to not much" in my opinion.
You can use your regular PLA settings, but I bumped my extruder temp first/second layer from 210/205°C to 220/215°C and my bed temp up from 50 to 60°C (blue tape).
It seems to be extruding nicely at 80mm/sec.
From eSun via intservo.com
http://www.intservo.com/products/esun-p ... 9061128323
Major differences between PLA+ and regular PLA:
Elongation At Break: PLA+ 29% Regular PLA 5%
Izod Impact Strength: PLA+ 7KJ/m2 Regular PLA 4.2KJ/m2