Developed a crack causing water to leak. Apparent design ...
592680
Developed a crack causing water to leak. Apparent design flaw. Lasted less than 2 weeks. Not reliable. Do not buy.
3993219
It leaked so I tightened it use a pliers and that's when it cracked.  I realize that it was probably meant to be hand tightened or they would have put a nut on the end but it was leaking and I didn't tighten it all that hard.
161181
It leaked from the base as soon as I added water. Not sure if this was from a shipping issue or a manufacture issue. I can not tell you how it works since I did not want to plug it in with the water issue. I did get a return without any problems.
1059884
This motion bubbler had a small manufacturers defect in the seam of the plastic so it leaked slowly overtime. On the bright side ... I returned it and got my money back. Perhaps just a fluke that I got the leaker.
2794661
It Leaks. I sent to change the water holder but the replacement has the same problem.
2944357
When filling the pool the first time, when water reached the level of the pump hoses, water came gushing out of pump.  Used provide plugs to plug hose holes and checked pump.  Top was cracked.  Unfortunately, Amazon doesn't seem to provide way to report problem to manufacturer and I don't want to drain pool and return for the one item.
2973220
Absolutely a great design but the plastic material used to build the siphon cracks.  I have gone through two siphons and the same thing happen no matter how careful I am.  The shut-off valves can stop the water from flowing but the tube and the connection assembly cannot hold the normal home water pressure.  Bottom line, manufacture it with higher grade and thinker plastic and upgrade the tube-connector assembly and improve the siphon ventury chamber for even better suction.
4354080
the bottom had a crack the entire width of the churn and it would not hold the water.  Soaking it in water as recommended did not close the crack.
am trying to close the crack but for price of product this should not happen
4494994
Nice unit, but of course, it leaks.

Took the unit out and it turns out the problem is a broken connector on the end of the hose; there is a brass piece, connected to the end of the hose, that has a neck on it with the thinnest wall you ever seen, and of course, it cracked right there.

If they added just one extra millimeter to the neck of the brass piece it would be robust enough to survive, but they machine it down to paper thin.

Further review of Amazon shows many other reports of faucets with 'cracked hoses', all different Oriental brands, but probably made in the same factory in a very large Oriental country.

Why not spend a little extra in making the unit and charging us 5$ more, and saving hours on the other end?  I would have happily spent 5$ more dollars on the unit, and have it actually work. I like the style.

Great seller refunded money promptly!
1578528
This item worked well for a few weeks, then began leaking badly. It needs refilling on a daily basis since the water ends up all over the floor. So now it sits in the garage, unused. We have cleaned the filter and bowl regularly in case of clogs, but that doesn't help. There are no cracks or broken spots that I can find, it seems to be coming out from the reservoir behind the machine. We had the previous model for years with out a problem, so I can only guess that this is an issue with the new design, since lots of other reviewers had the same experience. I wish I had paid more attention to the negative reviews. Read them before purchasing, it could happen to you, too!
1717629
REVISED from 1 star to 4. As I suggested would help fix the leak problem, there was indeed a thin translucent washer to seal the leaking joint. Problem seemed to come from by too-vigorous washing to remove any possible mold release left on the plastic parts. When I got the replacement product I observed the washer, covered the drain, and washed. Washer jumped right out. Problem solved. So, is the a less-than perfect design, or did they just not test it with over-enthusiastic user? Either was, the problem might be fixed either with documentation or with an engineering tweak to make the washer more fool (raising my hand) proof.

Hey, and what about its function? It works to instantly to soften a nice bottle, or even a cheap one. Very happy now. Cheers.

PREVIOUS REVIEW
Leaked profusely from the screw-joint between clear and plastic parts. Aerated nicely. Buy it if you don't mind cleanup and losing 15% of your bottle of wine. I applied airplane glue and this seems to hold. Search for "Testors 3509C Testors Plastic Cement Value Pack". Or just return the damn thing./\
367412
After replacement, it leaks no matter how I tighten it with pliers. Can not tell whether it is a design flaw on filter house, or filter itself. Have to buy a new set of filter kit.

update 06/29/2017
Ok, I added two more stars. Regarding to the leaking problem during replacement, I came across a review which mentioned you should not over tighten the filter. So I tried, and it worked. There is no leaking water anymore now. What I did was to have the water running when I mount the filter and begin to tighten it. At a point, you can see the water stop leaking from the side. If keep tightening, water will splash.
1807045
Hoop is great but base is cracked and water is leaking! Until the hoop was built and water was added we didn't know it was defective.
4649479
After inspecting this water bottle thoroughly the one thing that stuck out was rubber seal inside.  I was thinking that there was spaces that could harbor germs around the seal and the constant friction from opening and closing the spout would eventually wear it out and it would break.
It was nice enough to use and I usually like Contigo brands but I looked at some reviews from other customers and I saw they had the problem with the rubber seal breaking.  I have not had that happen yet but I have not been using as long as they have and I would say that this is a design flaw and would be very disappointing to purchase this nice looking water bottle only to have it break after a short while.  I will update this review after a few months or sooner if anything happens with the bottle.
4289008
Bought two of those. Designed by somebody who has no idea about materials. First broke within a few weeks. Second cracked badly and leaking.
3679999
Liked the spa like design. However the water pressure was not great and the swivel ball joint sprung a leak. So now it's back in the box. Might be garbage now since Amazon app says my return window closed a couple weeks ago.
659433
I loved the design of the fountain.  Yes, it was hard to position correctly.  But once it was on, the water flow was nice.  My cats took to it right away and seemed to enjoy drinking from it.  The problem came about a month later.  I noticed water puddling underneath.  I thought maybe it splashed somehow.  I took it apart, drained it, checked it for cracks, put paper towel down, and carefully placed the completely dry fountain down.  I made sure nothing splashed while refilling it and went to bed.  In the morning, I was surprised to find the paper towel completely soaked and about a third of the water gone out of the bowl.  It seems the water is somehow seeping from the bottom.  Amazon's awesome customer service saved the day again.  While I had to pay a fee, they did refund most of my money when I sent it back.