The Crucial P5 Plus is the latest flagship SSD from Crucial. It is built using a new in-house PCI-Express 4.0 controller made by Micron, paired with the company's state-of-the-art 176-layer 3D TLC NAND flash. At $180, the Crucial P5 is priced similar to the offerings of WD and Samsung, does it have the performance to match?