re: Best tankless natural gas water heaters?

Anyone have recent data on $ savings strictly regarding energy use with tankless vs tank? I remember checking on the savings with electric and it wasn't anywhere near worth it. The standby losses on tank was minimal especially if adding another insulation blanket. The main advantage would be limitless hot water. Fwiw, I had a electric tankless for a while and it sucked. May been just a faulty or cheap unit though.

But I also remember savings on gas tankless to be a bit more attractive due to how a gas tank heater functions.