The Lenovo Flex has an HDD storage medium which is better than most portable PCs of this age and type. Most similar spec laptops that were released one year ago have an SSD storage medium. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.
This portable PC's storage medium (HDD) is in fact the worst storage medium amongst all 2 in 1 laptops that have been available for around the same time as the Flex.
An SSD storage medium is the best storage medium across similar types of portable PC.
If the storage medium of this notebook PC is too bad for you then you might also want to look at the HP 13-r100dx ($850.46) (Hybrid-HDD).