I upgraded from the plain F2 to the F2-BT version. I currenly have two F2-BT units, on black and one white. I enjoy using them. I had a review here a bit further down, but that one was for the non-BT version. All that I write there is still valid, as for BT features: I use them with timecode from an Ultrasync Blue device. All is fine, but it was a bit tricky to connect both devices at the same time. I could not really make the two devices to connect with the phone for remote control though. Zoom should use different Bluetooth names. Another thing that could me made better is allowing to change from timecode or remote control functinality from a smartphone rather than just the PC: this way if you forget to set the BT mode at home, you are in trouble. A few more little annoyances that could be changed by a FW update by Zoom: ) 1) allow custom filename to contain time/date as well 2) allow playback of earlier files not ust the last one. Apart from the nuances, it is a great little tool.