I mentioned this in the Recent Finds/Purchases thread over in the TFA forums, but I wanted to reiterate it here (because of its relevance). I picked up the General Grievous Constructible figure on Friday morning and it is easily the best toy I've gotten from the entire launch (note: I can't afford expensive BB-8s).
I've never been a fan of Lego's previous forays into the constructible figure realm (Bionicle, Hero Factory, DC/Marvel), so when they said they were doing SW, I kind of groaned. Still, with Grievous being mostly mechanical, I thought it might work. And it does. Boy, does it work. Not only is it the best example of a Constructible figure Lego has done, IMHO, it manages to be one of those rare toys in this day and age that is significantly larger than what you expect by looking at the box.
Grievous is at least 13" tall, and that's hunched over in his typical posture. The build is also much more interesting than past constructible figure builds (even though it's still all Technic and Bionicle/HF parts) but once he's built, the size and detail is just amazing. Words can't do it justice. If you're a fan of Lego, or Grievous, or looking for something different, I can't recommend this one highly enough. Sadly, with the past history of licensed constructible figures from Lego (not to mention prequel stigma and his being the most expensive of the range) I think a lot of folks might pass, but trust me when I say this one is a winner and one of my favorite purchases this year.