Leaks. One of the two tubes I ordered leaks.
930558
One of the two tubes I ordered leaks.  I found out the leak after the installation. Not happy with this product.  That said, the order came in on schedule. Happy with delivery so given this a two stars. Otherwise, no star!.
4202676
Upon using for the first time, one bottle worked, the other leaked.
3635118
I ordered the 2 pack and it came rather quickly I checked them out seemed ok so I replaced my old tubes with these. I noticed that one tube (it was the tube I used on my front wheel) need to be re-pumped several times throughout the day and I haven't even taken the bike out for a ride yet. Low and behold one came with the tiniest hole in it. The other tube performs as if should, wish they both did.
279063
One of the 4 spouts I cannot even use due to leaking issues. There is another that seems to drip once and a while whenever I am not looking to know which one it is. I am planning on taking them all apart and seeing if I can simply change out a seal or an o-ring or something to give them a more better fix. Based on the price and speed of shipping I am not really disappointed just wish I didn't have to go back and fix it while it's still somewhat new.
4788932
One of the two filters leaked badly the first time I installed it.  I had to remove it and re-install it 3 times before it sealed up properly.  The second filter fit fine.
254909
Ordered this both sections leaked returned for a replacement the replacement set leaked worse than the first set.
2200792
The tubes were defective.  I rode once on one tube, and it developed a hole in the *side*.  Nothing punctured it.  Examining the tube, there was a ring of scuffing / damage around the hole.  I took out the other (unused) tube, and lined up their valves.  There was similar scuffing, and the start of a hole, in the *exact* same location.  (See attached photo - bad tube on the bottom, unused tube on the top.)  Maybe the packaging damaged the tubes somehow?

Regardless, new tubes with almost-holes in them is the worst possible thing.  It would be better if they had full holes, so you knew they were bad before you installed them and rode on them!
413706
Previous orders were fine. But all of the tubes in my most recent batch are failing in the same way - the valve is breaking free from the tube at the seal. I got 3 miles out of one of them.  Very disappointing.
1095302
I bought two of these, but one of them never seals properly and leaks whenever it's turned sideways... The other one is perfect, but it's the one that I no longer have.
3550578
this is the second one I've had and both have started leaking after I have not used them for a couple of months
1937876
A few months ago I bought two of these hoses. One burst on the second day of use while the other started leaking two months later. As a result I threw both out.
379400
I like the product but Ive ordered 2 now and haven't been able to use either of them because both came damaged and were leaking. Since they weren't sealed I was worried they were unsafe for consumption. Improve the packaging and my review will go up.
258602
Mine arrived leaking out the holes for both valves.  Seemed like good quality but water dribbled out with the valves on or off.  Tried tightening the screw and same problem.

UPDATE:  Company quickly offered to refund or replace faulty unit, so while I'm bummed I got a bad one, they are willing to back them up.
3893207
I bought two of these. One started leaking after a few weeks and the other starting leaking after months of use. So I'm 0-2 and having to look for another option.
1507790
I am giving this two stars because one of the products was defective and leaks. The second one works great. I am keeping the defective one because my husband can fix it. It would be nice if you test your products for leaks before sending them out to customers.
787687
I installed this on my bike and drove to the Miami critical mass. After around 5 miles the new tube leaked out completely. The valve was defective and was letting out air. The inner tube lasted exactly 5 miles before going bad. I am going to exchange this and hope I just got a defective item (I bought a pair and will install the other tomorrow and hopefully this one lasts more than 5 miles).

EDIT 9/13/13: I have since recieved a replacement from the seller. The seller was very couteous and prompt with sending me a replacement. I have not ridden on it yet but when I do next I will update the review. I am changing my initial 1 star review to 3 stars because I had to go through this (and was left stranded on the road), but the seller was very nice and sent me a replacement ASAP. I would recommend doing business with them.
2826331
Some of them are working ok, but I got two that are defected and as soon as I filled them with water they started leaking, I don't have time to take them to the post office and return them, so I just deal with it but won't buy from them anymore.