(Thanks to Dad for taking the photo. He's good, don't you think?)
It works great. It holds the needle quite firmly so that it stays put and can hold the weight of the fabric as I knit the stitches off onto the other needle.
I need to practice a few things. For starters, my left hand can't stay away from the knitting. I'm still letting it participate while I get the hang of things, just so long as my thumb doesn't do any work that will aggravate it again. It's also quite easy to slip off to many stitches (oh no, the dreaded dropped stitch) if you get too enthusiastic so it helps to knit at a slightly looser tension than I usually use for socks. Not too loose mind, just a little bit.
I suppose the only big setback is that I can't use it to work on my vegan knitting project. I don't think it would be fair to my vegan friend to use a non-vegan item to make her a vegan knitted object. I'm about half way through that project, so I'll just have to find another way to finish it.