Product review (2 stars): Good design, but bad make
In the last year, I bought one, but return it within three days because it could not sink. And then I bought another one, it's always sinking (leaking), and then exchanged one, the third one was also leaking, but not serious. A couple of weeks ago, its warranty would expire, so asked the manufacture to fix the leaking problem. Their service was good, at last they found the problem and got fixed.

So two stars.