Average fare. No maintenance hatch, battery fixed, clattery keyboard, dark display, weak GPU - the Lenovo Z51 does not really provide rays of hope.
http://www.notebookcheck.net/Lenovo-Z51-70-Notebook-Review.150613.0.html
I've got a Z51-70-80K6 with glossy screen and i7-5500u CPU, which does not match this description, so I guess the 80-k6 is not the right way to distinguish Lenovo models