The RetraxPRO MX cover, Bizon electric cover and the Retrax PowertraxPRO MX cover are well-reviewed retractable truck bed covers. Each of these are tonneau covers and have a 4.8-star rating or higher, according to RealTruck.com.
The RetraxPRO MX cover has a 4.8-star rating, as of January 2016. It has a low profile design, it is lockable in any position with a key and it opens and closes with one hand.
The Bizon electric cover has a key fob that opens and closes it, electromagnetic brake locks and a built-in LED cargo light. It has a five-star rating.
The Retrax PowertraxPRO MX cover has a five-star rating. It is made of aluminum and has a key fob that opens and closes it.