I was browsing through the forum and stumbled upon this post. coming from one who stays in punggol in a 4-rm flat with mbr toilet that uses rain shower and the common toilet who utilizes normal shower, with a prima fe10 ferroli gas water heater, I'd say that rain shower feels pretty much like rain to me, and showering, washing etc is not a problem. unlike @exxtreme, I don't need 20sec to get hot water running through the pipes. I have been using the gas water heater for close to 3 years now that I am staying here, and I am very pleased with the experience. Indeed, cost of bills dropped significantly as compared to my instant water heater water utilization in my previous residences. as for water tank, i think it's also good to identify where it's made from and whether it may rust. My boss stays in bukit panjang area and his water tank is in need of a replacement now after using it for about 8-years. I think to each his own, but thus far if you're staying at a new estate (BTO), going with gas centralized water heater, going with a central gas heater won't go very wrong. Oh, do position the heater at the right place, for me, my mistake is that i placed it at the hang-clothes area and it's now blocking the retractable clothes hangar. Another thing to note is that mine is Ferroli's model, as such, it requires a power outlet to fire up the gas. no battery needed, but need a power-socket. I would have loved to get Rinnai, as I am a jap fan, but the Rinnai requirement was to have a very ugly exhaust pipe that goes out to the window grille. Prima FE 10 didn't have such a requirement, and Max(Something) is a Chinese brand which I am not that comfortable with. That's why I went with Ferroli.