I've had a GH4 with Vlog for the past week. Got to say that I've really enjoyed the flat profile. From what I can tell it is giving me an increase of 2 stops Dynamic Range. I'm still trying to find the perfect base LUT for it, but so far my favorite has been the Amira LUT that is in Premiere Pro CC. Would love to have a thread for the GH4 users to post VLOG processing tips for when vlog finally gets released.