One great thing about the Taft home is that unlike a lot of presidential sites, you don't have to drive to the middle of nowhere to see it. But I also don't think it's very well known, so you might go past it many times without even knowing it's there. And it's a national historic site!
In my hometown, Indianapolis, we have the home of President Benjamin Harrison, and for some reason it seems to get a little more press than I gather the Taft home gets. Its location may be one reason for that. You have to use your imagination somewhat, because though the Taft home has been very carefully restored to its appearance during Taft's boyhood, it is closely surrounded - even tightly hemmed in - by a buzzing, modern urban neighborhood that includes the UC campus, Mount Adams and unfortunately, right behind the house where the Tafts' pasture once was, a sprawling judicial center.
But if you can get yourself inside the house with the door closed behind you, you are transported back to the time of Taft's boyhood. The guides are friendly and knowledgeable and the tour is quite extensive. Best of all, it's free, and probably much closer to whatever else you happen to be doing in Cincinnati than you realize.
A couple of tips. First, my visit was on a humid day in July, and the house is not air conditioned. It was bearable, but just a bit uncomfortable for me. So I agree with those who said that this would be a good Winter or cold weather day visit if you are sensitive to heat and humidity.
Second, several have commented on the tiny, insufficient parking lot next to the house. It IS tiny, and probably full when you get there. But there is a much larger auxiliary lot just behind and northeast of the house, accessed around the corner on a side street. If you know that additional lot is there, it's easy to get to, free, and connected to the house by a walkway. The tour entrance to the house isn't very well marked, but I found that you just want to go to the front door, and just walk right in.
Getting back to that large, modern judicial institution building that looms directly behind the house where the pasture once was - it occurs to me that it's strangely appropriate there. That's because Taft valued his career as a lawyer and judge, and his service as Chief Justice of the U.S. Supreme Court, much more than he valued being president. And he left a lasting positive legacy on the U.S. judiciary. So Taft was something of a "large judicial institution" unto himself. I guess that big building back there behind the house is strangely appropriate, after all.
I highly recommend this site!