Seems to be ok. Sometimes it takes a few waves of the hand to open. Just had it for a short time so not sure how long batteries will last. It appears to have a plug for external power source but there is no power supply included or any information on what kind you would need or how to order. It would also be nice if it had a liner basket although I guess it would be difficult to remove due to the way the top goes on. Also seems a little pricey for the size and average quality but then I guess everything is expensive these days.