Ta-da! The dreaded Up-Down Entrelac socks are done and I enjoyed knitting them much, much more than I expected. I'm wearing the socks as I type this and they are surprisingly comfortable. I would have thought that the entrelac triangles would be uncomfortable along the sole but I'm not finding that isn't a problem. The legs are snug and show no signs of drooping.
I encourage you all to try these socks--or any other pair that seems daunting to you. Like me, you'll overcome your hesitations and you'll learn something new (like you shouldn't have been daunted in the first place).
The feet are just a bit loose so I plan to give them a bit of a vigorous wash in a basin of warm water to shrink them down a tad. This will probably take a number of washings because I don't want to overdo it and shrink and felt them too much.
For those of you wondering how much yarn is really used, my socks weigh 86 grams and there are 77 grams of unused yarn. You can easily get three pairs of socks out of two of Kathryn Alexander's yarn kits.