HI mate it looks ok , in a crash some thing has to give so if the arms dont it may bend motor shafts , i have a clone of the dji 450 i have had a few crashes snapped a prop broken arms , but kk board, motors, escs are all ok and they cost to replace ,arms are pennies a complete frame is £17 , can you get replacement arms for this quad , what you need to do is this look at what parts you think your need after a crash , can you get them easy and fast you dont want to wait 4 weeks from hong kong , so you need to take all of this into account , you will crash we all do its all part of flying , quads are a bit cheaper then a cp helicopter but when you start fitting FPV or GO PRO the cost can come up a lot if you damage this part of the system your flying