I have always used slings as my EDC. I haven't purchased a quality bag yet. I own the Red Rock rover and rambler. I also just purchased a Satcom bag from Countycomm. I'm ready to get a quality two strap backpack with plenty of room. Hazard 4 makes the Second Front rotatable backpack that has some characteristics of a sling. I am a firm believer that you get what you pay for, that being said, has anyone ever owned or seen one before?