Surface tests and formats were all quick ..I wanted to be and running ...so not very good tests
So Far So Good system was bottlenecking at Hard Drive, Boot was slow, opening extensive apps was slow (Adobe Photoshop 2017 e.g.) ; Boot speed much faster, Photoshop opened much faster..; never got to compare this to a ssd drive (which I thought I was buying stupid me)...
How long will this last That we shall see..; I will write back if the time comes; No Con here it is May 2019 and still running quietly and good as ever