That makes it hard to pigeonhole the Lenovo IdeaPad Slim 3x 15 (starting at $749.99; as tested; price set to $569.99). For all its problems, the IdeaPad Slim 3x 15 looks pretty attractive when it's on sale. Configurations: A Fence-Straddling List PriceLenovo lists two configurations for the IdeaPad Slim 3x 15 on its website. (Credit: Joseph Maldonado)The IdeaPad Slim 3x 15 is reasonably portable at 3.52 pounds and a slim 0.70 inches max. That increasingly rare option makes the IdeaPad Slim 3x 15 a bit more future-proof (and an especially handy feature for my 256GB review unit.)