Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless, from my experience

A little while ago I spotted these markers on here for $7.97 a pair. Thought for that price, I might just as well try them... Well turns out, they weren't even worth that much.I ordered two pairs and out of the four markers, one was completely dead, one would just very faintly stay on and not blink, and the other two (which I assume were working correctly) would blink so slowly than if you were to rely on them to see where your driveway ends, you would have to stop and wait for them to light back on. And should I even mention that you have to take them off the PVC pipe that acts as a pole to turn them on, the switch being in the hollow base ?I don't know if Amazon sold them at such a low price at that time because they were getting rid of a batch of sub-par units, but I wouldn't even begin to think of chancing it for the price they are selling for now. And not only are they cheaply made, but they look even cheaper. Spend a little more money and buy serious markers...