OVERVIEW: Robust and protected propeller, making it safe for training. Altitude Hold is a great feature for first-time flyers. Ideal for young children and adults who are children at heart. UPDATE: To avoid an uncontrolled climb, DO NOT use the auto launch button. Instead, pull both knobs down and in until the motors start spinning. I also bought a UDI 46 which is the exact same item (but blue) which is sometimes cheaper. DETAILED REVIEW: Flight: With altitude hold, this quadcopter hovers like…