IMHO, Kohler makes some products that look great. Some of them are really hard to install as the specs call for extremely tight tolerances. AN example, one shower wall spray's supply line had to be within 1/16" depth when tiling around it...that's really hard to attain. They are severely infected with the NIH (not invented here) syndrom...as a result, they try to reinvent the wheel a bunch of times. This does not always work! Should you decide you want one of their products, make sure to stash away the instructions and parts list, and you may have trouble finding repair parts at the local stores as they change things often. Their parts book is more like a phone book, so most places won't try to stock many of their parts. They also outsource some of their products, having them made in China, so while it is a US company, at least some of their stuff is made elsewhere.
On toilets, if you can view a sample, either from a picture, or in person, unless it has a hidden trapway, take a look at it from the side and note the shape and direction of where the outlet is pointed and how it got there. On a Toto, they route that waste in a nice curve so at the outlet, it is pointed down into the drain. On many others, there's a convoluted route, or they try to make the turn to the outlet at nearly 90-degrees which both slows it down, and may cause a clog if the stool is longer or harder than norm. Waste likes smooth turns to flow well without slowing.