I had my HD+ unrooted on stock for week and could not stand the speed. Apps crashing constantly, extremely sluggish behavior; I couldn't stand it. I didn't have a micro to full size SD card adapter, so I ordered one of off Amazon. I rooted and then tried every ROM available for our Nooks. I think CM11 runs best.
Sprint Galaxy S3
PA 4.5 Beta 1 Build 2 w/ART
BMS Kernel Build 2014-08-06
2012: Kindle Fire(Given Away) /Motorola Droid (Lost) /IdeaTab A2109 (Traded For GT2) /
2013: Galaxy Tab 2 7.0 LTE (Bricked) /Razr M (Sold) /Galaxy S3 (Current Phone) /Sero 7 Pro (Broken) /
2014: Nook HD+ (Battery over-heated)