I bought two tubes to replace old ones. I like the long stem. The tubes look hardy and solid. Installing them was easy and I like the value for the money. I'll be ordering more.
I use these tubes in Continental tires and haven't had a failure yet. I can ride a week before I feel the need to top off the air pressure. I usually ride at 75psi.
had a couple of other Kenda's fail where the valve stem meets the rubber. They lasted 10 years, but both failed within a week. Hoping for better with these. Not a lot of choices in the tube market.
I've noticed over time that Kenda tubes seem to last longer. I've re-used them occasionally with new tires, and they're often fine.
Discounted commodity purchase. Air loss at about 2%-3% daily. If using long stems on shallow rims, be sure that value stem is secure or some flats will occur at valve base. Have patched and the repair provided a lasting seal and a useful tube. Many punctures seem to happen near a seam, so patching is useless.
Solid Experience. A totally fine tube. I covered it lightly in talc and rolled it up good. It lives happily in my saddle bag in a plastics baggy.
I use them for road riding and racing triathlons. I ride a lot of miles on some pretty rough roads and rarely flat.