Does anyone have this attachment. Or even use it? Is it worth it?

Hi there. Thank you for reaching out. Hope that you could get the best recommendation from our fellow DJI Pilots here that currently using the said accessory for the DJI Mavic 3 Classic. Please note that this accessory helps you provide a 108° FOV and 15.5mm-equivalent focal length. Also, when using the latest firmware of the aircraft on this accessory, please note that the supported modes are: FocusTrack, QuickShots(except for Asteroid), MasterShots, and Hyperlapse. Panorama is not supported. Hope this helps. Thank you for your valued support.