It's nice but it's a bit heavier than expected. It could be a little less noisy but other than that she Loves it
Got for my brother and he seems to like it so far.
Have not used battery pack yet
This battery pack is excellent. It charges in a few hours. When ready to use the lights turn off.
Wonderful product. Wish I had ordered it when I ordered my portable oxygen concentrator over a year ago. I highly recommend this product.