Gas Heater review! So we've been here for the last 4 days and showering with the Macro MA-8NFL heater from citygas. Its one of the low end models that they say cannot be used for large shower heads or rainshowers. Here's my review. 1. Water pressure is great! Big handheld shower as well as rain shower has good pressure. That said, I never use both bathrooms at the same time. 2. Time to heat up is decent. It's NOT instant though. From the time I turn on the tap (must have mixer in the 'hot' region or there won't be a command for the burners to start), I hear a poof! when the burners come on (instantly) and then it takes about 15sec for the water to get warm. There is a slight variation in temp for another 30sec as the water really warms up, and then its stable. 3. If you shut off the water supply to soap up etc, the burners DO shut off. So when you turn it back on, I hear the poof again, and depending I'll get the leftover warm water in the pipes, a second or two of cool-ish water and then hot again. Overall, I'm happy with it. But if you're VERY picky about getting the water temp correct instantly, then I would say that this isn't for you. I haven't seen the electrical bill yet though so I can't say if there are savings. Shrug.