I can't think of enough superlatives to describe either the 1700 hardware or how well it works. I've been in this house for 12 years, and 3 of the 4 bedrooms have bifold doors with bottom-suspended hardware (2 @ 36", 1 @ 48"). During that 12 year period, every time one of the doors is opened, it falls out of the track, and no amount of adjusting will keep any of them in place for any length of time. Last go-around with hardware replacement, I'd had enough and went looking for something different. I found the 1700 on the HD website and did a little research. It suspends from the top track, and isn't much more expensive than the bottom suspended, made elsewhere stuff. This product is made in USA.
When you first look at the direction sheet that comes in the package, it can be a little off putting. There is a somewhat technical CAD print you have to reference, and some of the steps are a little light on detail. You can, with perseverance, plow through it but, there is another option.
If you go the Johnson Hardware website (I couldn't find it on HD), under the 1700 bifold hardware page, there is an excellent video that takes you step by step through the install and breaks it down into very simple, easy to follow steps. I set up a laptop in the room where I did the first install and went through the video step by step. Took a little less than an hour first time around, and when I hung the door, it required no adjustment whatsoever. Unlike the bottom suspended hardware I've installed, which needed a second person, the 1700 was pretty easy for me to hang by myself
You do have to look around to find it in the store (I'm assuming all the HD stores are set up more or less the same way). The bifold door hardware is located in Millwork, and the Johnson hardware was located in another area from the other bifold hardware HD carries. Find and ask a Millwork associate.