What are people's experience with the "new" tankless water heaters? I know that the Europeans have used them for years, but the ones I experienced when I went to Europe last year did not impress me. They did not supply enough water for showers, only supplying enough for that annoyingly-painful, high-pressure, fine spray. Not my idea of a relaxing shower. I suspect I ran into the cheapo models, though, because they were smaller in size than the ones I have seen here in stores, and they were installed in Bed & Breakfast Inns, where lowering costs is usually more important than comfort. The thing I am most concerned with is volume: enough for several long, hot, high-volume showers.