Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be careful - Amazon got a bad batch of these

I know several people with this router who love its price/performance ratio -- though not the most reliable or powerful, it may be the best value for its price.However, I've gone through two of these from Amazon that work only for wired connections. D-Link technical support said Amazon got a bad batch of this unit with faulty wireless connectivity. D-Link couldn't tell me whether Amazon had replaced the faulty batch or not. Just be careful when you order -- you might end up needing to replace the unit directly with D-Link.