Amazon Review, does not leak October 30, 2013
Reviewer: jdjaynes "owned by cat"
Some others reported that this leaked. My guess is that they expected the bottom to be tightly screwed on when they got it. After reading those reviews, when I received mine I made certain that I adjusted all fittings and it works great!
Amazon Review, Great design... August 11, 2013
I'm not a rocket scientist but after less than 1 minute of disassembling/reassembling the unit I understood how it worked. I then filled it and put it out... three weeks later I have refilled it twice and love the design. The people who have had isssues must not have filled it correctly... I'm assuming they don't realizes it pulls up/down to create a vacuum. Its pretty simple... make sure everythings tight; add room temperature mixture; hang the feeder and pull the bottom down to creat the vacuum . A+++++