I picked up a roll of PLA+ at Microcenter because it was on clearance. I didn't even notice the "+" until I decided to try that color, and I noticed it on the sticker. It prints well, feels like ABS, but smells like PLA when printing, and I can use PLA temps on my printer. It sands better than PLA, and if I I hadn't noticed the PLA+ sticker, and the smell, I would think it was ABS.
What is PLA+? How is it different than PLA?
I went back to Microcenter and the guy working the 3d printing section did not know what I was talking about.
I went to Microcenter another time and the guy in the filament area said that all of their PLA filament was now PLA+, and that the + meant it was to be used at a higher temperature. The boxes are labeled with 205 - 225°C. It seems that all the inland brand PLA I have is PLA+, save for the first roll I bought. It does not have any kind of temperature markings on it.