Friends I give you my own experience on SHAREit mobile app.
friends first of all many people use this application it means it is to popular before SHAREit I am using xender app for sending and receiving of data or applications it is also good but not fast at all but after my experience on SHAREit app I think this app is better than xender it transfer file too fast that you should not align mobile together for long period.
So, friends, this all is my personal experience from that I have to tell you prefer a SHAREit app for file transfer.