Last week I bought a p4,I feel p4 much better than the p3p.
The p4 has 4 vision sensors which sense forward and downward. Their sensing accuracy is centimeter level, which greatly increases hover accuracy and reliability. Traditional self-built drones can only fly in open areas. If flying without GPS or in areas with strong interference, they may crash. Most crashes happen when flying drones near buildings because the GPS signal may be blocked or interfered with. But people always want to fly in urban areas, to take off indoors and fly out through windows. Think about it? How many times have you wanted to fly in confined areas? From a hotel balcony or on the rooftop surrounded by buildings? Even in the dining hall at home? Equipped with Vision Positioning technology, you can fly your p4 in places you never thought possible before.
Can you really? Good luck!