Like all new things on the market. You’ll have to wait and see where the weakness is. Why would I put 4350psi into a cylinder that’ll get very hot or a very long air fill. Also pay extra for a H.P. fill. Esp. when I can safely put 3000psi into a LowPressure 2400 steel 85 and still get the same 103 cu/ft. of air faster and not getting hot. I agree that you’ll need the weight anyways with a drysuit. Hope this helps.