Ive had this in my truck (2014 Tundra DC 4x4) almost 2 years now.
Ill try to list all the pros and cons.
My truck isn't my daily driver, if im driving it, chances are im offroad, or heading offroad.
Pros:
-Doubled my range, ive maxed it out at 523 miles on one fill
-Super easy install, all bolts up easily to stock stuff in stock location
-It WILL pass CA smog (its listed as wont sell to CA, ive talked at length with them about this, and its basically cost prohibitive for them to get all the crazy certs needed to sell it as CA legal, all the stock stuff connects and bolts up like the OEM tank)
-The bed liner option has taken a hell of a beating and still looks great
Cons:
-Lost about 2" of ground clearance on left side, ive learned to compensate for this with my line choice offroad
-Uses stock mounting (more on that later)
-No skidplate available.
Now..... my big warning about this tank... take a close look at how the stock tank mounts. The straps connect to the little legs of the frame with pretty light duty nutserts. Your almost tripling the weight youre asking those nutserts to hold up.
A few months after I got it, I hit a rock with it (full) in Borrego. Friend started screaming on the radio. Entire tank was basically ripped off the truck. Used some heavy duty ratchet straps to get it back into place and limped home.
I brought it to a fabricator/mechanic friend that was in awe about how light duty the stock mounting was for the weight.
He made some super heavy duty metal straps for it and replaced the nutserts with some much much beefier hardware.
Have bashed it on many rocks since, and no issues at all.
For those wondering about the extra weight, I am running Old Man Emu 2.5" lift with an add a leaf and haven't noticed the weight AT ALL.
For me, the range is MUCH more important than the ground clearance, so its a no brainer and I wouldn't trade it for the world.
But be warned, the stock mounting setup is VERY weak, so if you plan offroading, have a friend beef it up.
My .02
Any questions, lemme know
Check my link below for my build for detailed pics
Kevin