These are great tubes. I used to lose at least 10 pounds of pressure between rides that would just be a couple days apart but these tubes lose virtually no air pressure between rides.
I inflate my tires to 120 psi and the tube has not failed, so far I have 400 miles on it. I bought this brand inner tube to replace a Michilen tube which only lasted about 800 miles because the seam split. I used top quality Continental rims strips so the split was caused by a poor quality tube not a cheap quality rubber rim strip.
Nice low-end tubes. What I didn't notice and perhaps the ad didn't say was that the presta valve stems are super long. Like the kind you would use with aero rims.
Does not affect usage just looks a little silly.