I'm just now getting back to the forum since the last time I commented on this thread. If I typed your B&H part number in correctly... You got the hard edge screw in type of grad ND. If that works for you that's great.
The one I was describing can be seen on my avatar. It's a larger rectangular filter that fits in a holder that can be rotated and adjusted upwards or downwards in the holder for exact placement if your horizon line is not directly placed halfway in your viewfinder. With the screw on type you are stuck with the transition from light to dark right in the center of your viewfinder without being able to adjust it so you will have to compose your shot with the horizon line right in the middle of your viewfinder. It doesn't allow for adjustments upwards or downwards. So if your sky is only in the top 1/3 of your frame when composing your shot, you're screwed... especially since this particular filter you gave the part number for is a hard edge grad ND. The line will be obvious. If you got a soft edge screw in type for this 1/3 scenario, it won't be perfect but it won't be AS obvious. But again, the soft edge rectangular filter with holder will give best results and is more forgiving if you don't get your placement exactly right. So far, it's worked perfect for me and I can place it where ever I want .... Top 1/3, 1/2 way, or 2/3 from the top.
1more advantage to having a filter system that requires the use of a "holder" is that you can stack your filters without worrying about vignetting in your corners from having too many filters stacked on top of one another on a wide angle lens.
But if you got the filter you gave the part number for, and it fits your shooting style, that's all that matters. Some people prefer the circular over the rectangular and others vise versa. It's what ever works for you. 🙂