Did two repairs in my house (previous owner was a tad rough) and both work great and look great.
I am not a plumber but took my time and found it easy to do.

It came with all necessary plumbing. I didn't even have to adjust the flush or the level.

I installed this tank about week ago and works better than expected. My old Home Depot Glacier Bay toilet that I've had for years tank wouldn't stop leaking water into the bowl no matter how many times I replaced the flapper. I'm on a well so there is always some sediment which will build up in the tank hence replacing the flapper every so often. But this time a new flapper wouldn't solve the problem. I even put a rubber seal on the flapper seat valve. Didn't know why it wouldn't stop leaking. Didn't want to replace the entire toilet just to fix the problem if I could just find a replacement1.6 gal. tank that would fit a glacier bay. I stumbled across this American Std that seemed to fit the bill. The first one I ordered was never delivered. Got a refund and ordered it again. The second one was delivered as expected. The outer box was pretty banged up when delivery driver brought it out. Good thing I was home to open it while he was there. The inner box containing the tank seemed well protected and undamaged. I continue to open it as well to expect the tank for damage. I saw no visible damage to the tank. I thanked driver who w very courteous and said to contact them if found any problem later. The next day I installed the tank hoping it fit my old toilet bowl that was a 2 hole mount set up. Except for the tank -bowl seal that wouldn't fit my bowl everything went perfectly. I used my old seal instead. Everything was pre -assembled. Just attached the tank and reconnected water supply line. I did have to adjust the water level but that was expected. No More hearing that toilet refill every 15 mins. It's a good looking tank and I'm happy with purchase. No complaints so far.

Came faster than if I were to order it from local store. Easy to install. Was a bit smaller that anticipated but works perfectly! No issues.

Perfect fit. Good price