This works well over WiFi. I never used it over bluetooth. I suppose results vary among users. It gave me problems on a previous version with one particular file. It was weird because I transferred several files, one at a time, and when I got to this one file it wouldn’t transfer. But the same file did transfer earlier that day. I was updating files on my Mac and transferring the updated copies to my iPad 2. I ended up using iTunes file sharing for the one file. Nonetheless, I was able to transfer that one file on a day after this incident. At the time with this particular set of files I continued to make changes to, and I would transfer the changed files to my iPad 2. Who knows what that problem was because it worked early in the day, then not at all later in that same day, then worked again on a subsequent day for the same file, using the same version of Instashare. And it continues to work. So five stars because it’s free and it works. Thanks, Lukas Foldyna!