Instruct: Classify the given review into positive or negative sentiment.
Query: they live up to their expectations

These binoculars are lightweight and compact as advertised. They have good quality glass and are small enough to carry along on vacation, which is what we bought them for. Although we've had them only a matter of weeks, we have trialed taking them about town on walks to see if they're really as portable as they say, since we wanted binoculars for a vacation next summer. They are everything we expected. The case and lens covers are also good quality. For the price, they are perfect.