I said the exact same thing about the Phantom 3 when it first came out, and DJI promised "3 to 5 day delivery" After a month I still didn't have the P3, and I was given FIVE different ship dates by DJI, each one later than the next. I finally cancelled the order(s) and it took another month to get "most" of my money back from DJI, with them arguing it was "to late" to cancel because i ordered it over a month ago... And then later that it was already shipped (which it wasn't) and later that it was delivered (which it wasn't). Yes... That all happened.... In fact 2 months later I am STILL waiting for one final refund for a return (extra props) that was cancelled (and never delivered).
It was in fact customer service that made the decision for me to go with 3DR. DJI simply has the most inept, uncarring, noncommunicative, and all around horrid service I have ever experienced. I have founmd that it is also systemic and seemingly cultural, in that it is throughout the company.
Example: Try to find someone at DJI you can actually talk to on the phone about an existing sales order.... You can't.... Round and Round you will go, but in the end it is an email address that gets responses 5 days later, many of which are unintelligable, and require another 5 day wait for clarification. There were times when I truely believed DJI was going to keep my money and not deliver anything.
The month long wait time however gave me a chance to look into other people's experience dealing with DJI. I found I was not at all alone, and in fact DJI is legendary for terrible service. Many people having the same experience, and worse... and MANY people waiting several months to get their birds back after a crash, paying for shipping to China, fighting over whether it was even received, etc. etc. A definite adversarial pattern that I witnessed the beginning of. I decided a video quad was much to complicated of a piece of equipment to have really bad service and an adversarial repationship with the manufacturer.
Each of us makes their own decision, but if you hold DJI to the same standards you hold 3DR, my guess is that 3DR will come out the clear winner, and you will end up very unhappy with DJI.. At least that was the case with me.
In any case, good luck