I've cycled these packs maybe 25-35 times now and the performance is there for sure. I've been racing 8th scale with them. The only issue is their durability. There is nothing that seals bits of dirt from entering where the wires come out of the battery so tiny pebbles can enter and screw up the cells inside. Also there isn't a sufficient strain relief for the balance lead so it very quickly broke one of the wires inside and I couldn't balance charge anymore. I just cracked open the case to repair the balance lead and found the bottom of the cell stack is supported only in the middle by this little foam square, letting the ends flop around freely. I also discovered just how many little pebbles got in there and how badly the bottom cell was physically damaged. Probably not wise to keep using these. As things stand, hard to recommend, you get the right piece of debris in the hard case and case a big jump and puncture that bottom cell there will be a fire. I averted one. Hoping CNHL can revise the design, otherwise knowing I have to decase a brand new battery and install a foam pad that runs the entire length of the cells on top of potting the wire exits in hot glue or something is making me think maybe I should spend more for another brand...
Also an interesting observation that the battery cells take up the entire hard case, I thought for sure there would be some empty space in there given the larger capacity batteries are the same external size, 6600 and 8000 mah packs for example.