I am using this application from so long in my mobile and it works very well. It helps to save lots of time and big media can be share within 2-3 mins means it gives speed of 2-3 Mbps for sharing.
We have to switch on our mobile WiFi and then just share it. For the first time it will ask for some Nick name then it becomes easy process for sharing any thing from one handset to another.
Bluetooth sharing takes too long and same thing using shareit takes juz few mins. I highly recommend this application available in Play store and can be downloaded to any Android phone. Works Awesome.