I've been working on this for 10 hours so far. Rate of about 1.5 inches an hour. The yarn is some I purchased in Oban, Scotland over a year ago with the intention of making David a sweater. But with only 8 balls, it didn't seem that I'd have enough. So this I found this Aran style vest on Ravelry and am pretty excited about it. It should be done by Christmas.
There was a problem with the pattern: the second tier of cables seemed to be missing the first twist, because the chart was missing a row. Other Ravelry members solved the problem by shortening the 2nd tier. I chose to make them all equal.