Reasonably, I am very happy lenovo enters into ultra books. it wan not cheaper in ultra portable laptops in the market.
iit has some issues. lets talk about design, connectivity, usability, performance.
name suggests U310 is top compare to U300 . it comes outer metal shell. this good as we say for design. where there is hint for crack below screen I really dont like it.
in connectivity it has all features such as non gigabit ethernet, twins USB 3.0 and HDM. also you get wifi but ridiculously there is no bluetooth. I have som uch usage of bluetooth so people like me it is not good
usability: we can bet on lenovo for great typing experience. layout of chiclet keyboard is flawless. well spaced keys offer good amount of travel
it has 1366 by 768 resolutio. it is not full hd screen.
speakers: speakers are pretty average.
in this model it is powered by fast i5 processor.
there is no improvement iin battery life as compare to u300 model.