Works for me!

Exec Summary: Works for me, between old and new iPhones and a 4year old Mac on Mavericks. Never had an issue that hampered my productivity.
Full Version: Given the fact that Apple, despite feeble attempts with Airdrop and whatnot, has never quite managed to solve file transfer over the air in the simple ways I came to expect from them, this product seems to be a rather ok solution for something that must bear it’s very own technical complexities under the hood. All I can say, quite au contraire of many bad reviews here: well done.
It has a tendency to clutter the file list on the iPhone with duplicates and icons of wonderous origin and it seemed for a while that all icons point to the same file, but wiping the list and restarting the app (a matter of seconds) got me up and running again. However, if someone relies on the file list as some sort of permanent repository of files, this might be an issue. Apart from this the entire experience was very pleasant.

SmurfyJoe about Instashare - Transfer files