Best Buy has honest and unbiased customer reviews for Lenovo - Flex 4 1580 2-in-1 15.6" Touch-Screen Laptop - Intel Core i7 - 16GB Memory - 256GB Solid State Drive - Black. Read helpful reviews from our … Lenovo’s 2-in-1 convertible notebook series has just been refreshed with a couple of new models. So Lenovo Flex 4, while being a cheaper option, tends to get more favorable ⭐ reviews than the $848 Lenovo Flex 5 14", as seen on the chart below. Lenovo Flex 4 (15″) in-depth review Last year's Lenovo Yoga 500 was a big hit and gradually gained popularity throughout 2015 despite its obvious flaws. Unlike other 2-in-1s or even similarly priced laptops, the Lenovo Flex 4 … On top of that, it's fairly safe to say that Lenovo Flex 4 is a more popular laptop, based on its 100+ reviews… However, Lenovo has returned with even better … The Lenovo Flex 4 80VD0007US model I’ll review today is a sturdy, mid-range touch enabled convertible laptop that comes with good hardware and plenty of features for a sub $750 laptop (as of 11/1/2016).. Review.