I have 2-3 more years out of my Ultra 1, but I would like the Ultra 3 if it came with more health sensors and with the blood oxygen sensor turned back on which I need. I wear a Wellue O2 ring at night along with my Ultra and cpap machine.I just hope the Ultra 3 has the SpO2 stuff built back in. I'm not giving up my Ultra first gen if it doesn't. I track it nightly and during the day (although use a pulse oximeter during the day) due to recent lung issues. Not holding my breath (pun intended) though.