Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: No bass!

I was hoping these would be decent for wearing while running but I'm already really disappointed after listening to them for five minutes. They have no bass. They don't come close to the random Sony earbuds I have sitting on my desk at work - even when plugging into my laptop's cruddy headphone jack the difference between them is huge and unacceptable. Without bass they just accentuate the flaws in compressed audio.Ergonomically they might be comfortable, but I haven't logged the time to tell. They certainly feel like they'll stay on through most activities.