Definitely love the scale and been using it daily since xmas, seems spot and consistent. The wifi upload has been seamless as well. My wife and I each have our own GC account so the scale uploads to our accounts. One thing I noticed is that is you use as a guest (like my kid) it only gives a weight but nothing else like BF or bmi). Is this specific for guest mode? Meaning u need a GC account to get the parameters?