I am going to purchase a Phantom 4 this week and have read a lot in the forum about this series of drones. What has me concerned is that there seems to be an (ISSUE) with the P4 controller GL300C. which P4 does this controller come with? Is there really much difference in video and flying between the P4 standard and the P4 Pro or Advanced? It appears it my just be the obstacle avoidance which is not really a concern to me. As always thanks ya'lls help with this.