The Sennheiser Memory Mic

Phones now a days can capture amazing videos but it seems that the sounds is a little lacking. The Sennheiser Memory Mic ($200) is out to make sure the audio is equally as good. Designed to clip onto any thing even your clothing, it connects via Bluetooth but continues to record even if it's out of range. It can record up to four hours of audio at a time, recharges via USB, and has a companion app that automatically synchronizes the audio and video and also allows you to mix audio from the mic with ambient noise from your phone's built-in mics. Is this something that can up your video recording game with your phone.