Been thinking about getting a perfect prep machine for DC3 due in Oct. Read some rather scary things about mould a while back but from what I've read as long as you clean it properly and use the branded filters it's fine. Anyway my question is, is it any different from making bottles up by using a shot of hot water then topping up with boiled and cooled water? I'm on a very tight budget but will be happy to buy it if it's worth it.