Should I review the FREE stuff I got through Amazon?

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I’ve reviewed a lot of stuff, all items I’ve actually purchased on Amazon.
Recently, I’ve had two offers for FREE items.
I purchased a ‘Cravegreens Pest Control Ultrasonic Repeller’ last spring when I found a mouse in our travel trailer. I purchased a pack of four, sealed any openings in the trailer & scrubbed it out. I had two plugged into my trailer & two in my workshop when I got an offer from the company to try their newest ‘Pest controller’ for free. I thought “hell yes”…
The new FREE one has been plugged into my well-house for months now and it just does not work. There are still damn spiders & crawly things everywhere in there. I’m hoping it keeps mice out at least. Shit. I can’t spray toxic shit in my well-house!
So… I was gonna leave a ‘1 star’ review. But I didn’t pay for it.
I’ll go with the consensus on this meh thread.

The other item is a FREE ‘Dental Guard’ to stop tooth grinding at night. I haven’t received it yet.