the Libra is cheaper I believe and it doesn't require calibration but other than that I find it not helpful because as I said in in our hands both individually and with patients I think we're seeing accuracies that are plus or minus 20% which I just think is it's not good enough the Dexcom g5 was about plus or minus 7% the g6 I think is probably closer - 3 or 4% it's so accurate