Temperature and flow rate is now computer controled with a full
modulating gas valve so temp stays the same when it is on from start to
full flow. Older units lacked this. at very low flow it will turn off,
that is a drawback but it doesnt bother me as all my faucets are low
flow so I ususly just turn them on full. My payback will be 4-5 yrs
switching out an electric tank. I have no complaints after 2.5 yrs.