Of all of MAC’s holiday offerings, I do like their miniaturized sets the best, because I find them to be on par with full-size products.
The pigment sets are definitely the most value-oriented set, and I think the holiday sets are an opportunity to try out a variety of pigment shades without laying down $19.50 for a full-size pigment. Pigments can be really hard to use up in their entirety, so the smaller vials are perfect–and still more than enough for most! I would just caution you that each set does include either a few permanent or repromoted shades.
I’m not as gung-ho with the lipglass sets, but I do like that they included a lot of new shades in each of them, rather than the same repromotes each holiday season. The sets are a little more economical than buying full-size lipglasses (on a per ounce basis), but I like that you get to try five shades for the price of two. Lipglasses have a lot of variability; some are more pigmented, some are creamy, some are frosty.
The only item I did not like much was the nail lacquer set, because the shades themselves were a little finicky. I found two of the shades had a tendency to be streaky, and four of the five needed a full three coats for opaque color coverage. Though the shade selection did not affect the overall score of the set, I think it’s worth noting that none of the shades are groundbreaking–and MAC has done some interesting shades in the past.