Actually I agree that at this point it doesn't look like they will be substantially more efficient than an electric tankless, if at all. But if efficiency is similar and there are some small advatages here and there, such as slightly lower price, maybe faster heating, a green image leading to some state rebates, lower maintenance or maybe just good marketing it could still be worth being into it. If it only ever reaches 0.20 and only on a spike I'd still call it all worth it. And maybe there's something we're missing, they must have looked into the general math before starting to put the entire company together.