Hello all. This is my first post!

I work for a seedling grower and I get the privilege of finding a few dozen mutants a year. I live in an apartment, so I'm not able to plant them in a landscape, but I would like to propagate the ones that become something interesting in the next few years, but I need to practice. I've been looking at this cloning machine, with really good reviews online. Does anyone have experience using this machine with conifers? Are there better machines or methods out there that I could do in an apartment to learn and practice?