Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rebranded Kenda Tube, Faulty Valve Core

The tube, much to my surprise, is labelled the same as the old tube which came on my bike, KENDA, made in China. This is embossed near the stem, across from the stem is the Sunlite label in white. That doesn't bother me really, it's just a bit misleading, as this tube can't be too different from other tubes sold as Kenda's.However, the valve core is removable which was not advertised, and that removable core is leaking air. I imagine once I replace the core it will hold up just as well as any other tube, this is just a disappointing amount of difficulty for what is usually a simple job.