Never makes it to the camera's 30 minute clip limit. Plastic is flimsy and after very little use one of the slivers between contacts is loose from body. Only upside is > 200MB/s file transfers to PC drive.
I mostly shoot in 4K 60P, but I wanted to future proof with a card that can handle the 400Mbps C4K. I got four (256GB) cards for two of my GH5's. The card performs as expected. Recording times with 256GB = 1Hr 23 minutes of C4K (400Mbps), 3Hr 43min at 4k 60P (150Mbps) Just for fun I shot some RAW photos at 12 fps and it didn't even hicup at 100 photos. It is truly an amazing card for the price!