About 1980 I bought my first bulk loader, similar to a Watson, along with a handful of re-useable cassettes. I went through many hundreds of feet of cheap B&W film and enjoyed saving a few bucks. The results were mostly ok, and I didn't run into any problems along the way, just by following instructions. I didn't have a proper darkroom, so loaded the bulk roll into the loader at night in a dark room, under the duvet. 🙂
It worked well enough.
That was followed by many years of being loader-less and buying shop film.
Ten years ago, when my interest in photography had been re-awakened by decent digicams falling into my financial reach, my old interest in film resurged also, and I bought a Watson-type Computrol loader, along with about 50 Kalt-type reloadable cassettes.
I haven't loaded a single one yet, but the bug has resurfaced and I've just bought a 100ft roll of Fomapan 200.
At the time of the buying craziness in the late 2000 decade, I picked up a trio of Shirley Wellard reloadable cassettes along with a bench-type loader, but I don't see me using that.
In the fridge, there's 1000ft of Kodak type 202, just waiting to be used.
I've got enough film to last for a while, once I get around to using it.