Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice and flat, but almost useless

The nice thing about these is the shape: they're flat, and pretty durable. Buy them and they should last forever, or until you lose them in your next move.The bad thing is they don't serve their intended purpose: to produce light. I was aware when I bought them that they wouldn't produce a lot of light--you don't want a lot of light from a night light. But these produce practically none. I had one in my bath room next to the light switch, and it was enough light that I could figure out where to put my hand to flip on the main bathroom lights (which of course are blindingly bright at 4 AM) but it wasn't enough light to allow me to avoid having to flip on the light. Therefore it was useless. Save your money.