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.
There’s no huge difference between both. The printing settings like temperature and printing speed are practically the same. But the PLA+ have a much better surface quality and it’s slightly more bright than normal PLA. Another difference is that the PLA+ it's more effective in bridges than PLA.
If you want to the comparison between PLA and PLA+ go right here, PLA vs PLA+ (short review). This post is an awesome experiment with both materials.