I have an EXTANG Full Tilt on my Tacoma.
The EXTANG was the only light weight
, less than 20 pounds, that could be made to accommodate a cross bed tool box.
It has an aluminum frame and is covered with a vinyl material that has a life time guarantee.
It hinges behind the tool box and lifts from the rear.
If I need the whole bed it takes about 10 minutes to remove the top and all of the mounting hardware.
Just the Tonneau self can be removed in about a minute.
I've had it on my truck for almost 7 years and have had no problems with it.
I did need a corner bracket, called them and had it in 3 days at no cost.
It looks as good as the day I bought it.
I've had caps and prefer this arrangement.
If I need the whole bed it can be had with a minimal of effort and I don't have to worry about where to store the cap.
extangtonneau.com if you're interested.