Apple MacBook Pro with Retina Display (15-inch, 2014) review: Still the best higher-res laptop, but the competition is catching up - CNET
128GB PCIe SSUAX SSD Apple MacBook Pro Retina 13" A1502,15" A1398 Late 2013, 2014 | eBay
How to Upgrade the SSD in a 13-inch MacBook Pro w/ Retina display (2012–2013) MacBookPro10,2 - YouTube
Amazon.com: GODSHARK mSATA to A1398 A1425 (2012 & Early 2013) Adapter for MacBook Pro Retina SSD Replacement, Mini PCIe SATA SSD Converter Card : Electronics
MacBook Pro 13" and 15" Retina (Late 2013-Mid 2014) SSD - iFixit Store