"ease of using" is correct and usable in written English.
You can use it in any context in which you are describing how easily something can be used or operated. For example, "The ease of using this website makes it a great choice for digital shopping."
The providers in Practice C were not optimistic about the usefulness and ease of using the GEM information.
They rated the usefulness and ease of using the tool, and were asked whether the tool saved time, improved their ability to provide care and whether they would recommend it to other healthcare professionals.
The participants in the experimental group expressed a positive attitude towards to the use of these networks for educational purposes; these positive attitudes were grouped in two subscales: 1) The ease of using online social networks; and 2) The usefulness of using online social networks for foreign language learning.
Mr. Rashtchy said he was particularly impressed by the ease of using the new Google feature.
I was struck by the ease of using a paper chart, where I could write things down and order tests while I was walking from room to room.
Moreover, some say, there might not be much demand for one-to-one communications, given the ease of using the Web.
The ease of using built-in shortcuts for documentation in medical records is teaching younger physicians to be efficient at the expense of being thorough.
Except, it turns out, for a certain group of plaintiffs' lawyers who, despite the relative ease of using the claims facility, is insisting on pursuing litigation against BP.
The 30-second spot shows a stop-motion animation in which a tray of children's play bricks is rearranged to resemble a browser window – an image intended to represent the simplicity and ease of using Chrome.
"London leads the way in so many different fields and we will be the first in the world to allow the millions using our tube, trams, buses and trains to benefit from the ease of using this technology".
Anti-gambling pressure groups have blamed the high-prize machines for the proliferation of betting shops on High Streets in poor areas of Britain, saying the ease of using them encourages the desperate to wager money they can ill afford.
