I am on my third Keurig, my second K15 machine in 1 year.  This is very disheartening.  I brought this for capacity and thought it would work like a charm however, I am starting to see a trend, it takes at least 3-4 minutes for coffee to begin to  brew, and now it starts brewing and no water comes out.  I only use bottle water for this one, my very first one I was able to use tap water, and it lasted 3 years.  When it died I found out that bottle water was best so when I purchased the K15 I started using just bottle water, this one started to do what this new one is doing- dripping water to brew, making the brewing noise but no water dispensing or either waiting 3-4 minutes before the it does brew.  Sadly I will not be purchasing another machine-- I just may change brands and a little research..