I haven't tried it on top, but I use it in the bobbin on both my LA and domestic. I have a Voyager (LA) and an Elna 6500 Heritage Edition. I really like Superior products. I use King Tut on my Voyager and it works well with the Bottom Line. I usually use YLI Soft Touch with the Elna, which is also a 60 wt thread. I plan to use the Bottom Line in the bobbin of my new embroidery machine once I run out of the pre-wound bobbins.