It works very well indeed. Since I bought a bunch (like a TON) of Uni thread (ya can't split it!!) on an online sale when I first began tying, this became my go-to for a "split-thread" (cough, cough) option.

I've wished I hadn't bought so much many times (but it was SUCH a good deal *eye roll*) as I'd have liked to use Hans' method of flattening the thread and splitting it to keep bulk down. But since my flies aren't anything to fall in love with it works well.

Jeremy - who does more talking than tying...