We purchased a drone from Tomtop and item arrived defective with one of the rotor not spinning. Contacted their CS many times, have to send them pictures and videos of the defective drone. Their CS do not actively respond to your email. They will limit the time you can contact them, like after 48 hours, to follow up the issue with them. Then after that they change their story and will not replace the item and says their supplier will send a replacement rotor and expect us to repair the drone by ourselves. So far after 1 months, still not getting reply from their CS. No replacement, no refund, no contact from their CS, and got a bad drone.