I'm also making progress on the spindle spinning. This is the first time I've spun with the merino tencel. I'm not yet sure how I'm going like the finished yarn - mostly because of the shiny-shiny. I love the sleekness of silk, but the tencel seems just a bit over-the-top glossy.
As a fiber to spin, I like it pretty well. I find that silk tends to stick to my hands and be difficult to spin in the summer humidity. The tencel doesn't have that problem - it's a good summer heat-and-humidity fiber.