Riddex Plus reviews on Amazon.com are mixed, with equal numbers of positive and negative reviews. Many people highly rate Riddex Plus as an effective nontoxic way to deter pests, particularly mice and cockroaches. However, many others report that the device has no effect at all.
A majority of Riddux Plus reviews on Walmart.com are positive. Many people find that it deters rodents and cockroaches, though fewer find it effective for ants. Many negative reviews state that Riddux Plus does not work, and one reviewer describes cockroaches sitting on the device.
A review of Riddux Plus on ConsumerSearch.com states that its claim to deter pests lacks any scientific basis. One review on Amazon.com reports that the device works initially, but mice seem to adapt to the sound. Some reviews state that Riddux Plus disturbs pets, and others complain about customer service and billing issues.