"I built this with my 6 year old--well out of the age recommendations--and have build enough of these with my children that have required additional engineering that I am now adding a review.
I am surprised that the reviews are as good as they are...this is a great concept, but it is clear that lego cut some corners with this set. Lego has added blocks where they aren't necessary, and has skimped in places where they are needed. An example of this is the Bacta tank that is always falling over...I dug through my kids' legos and added a 1x4 flat support along the bottom, which helps but doesn't completely solve the problem. Another issue is that the center support for the black medical droid was not long enough to fit into the base provided...solved by removing some of the droid's hidden (!) hardware...A third problem, also encountered with the Darth Vader transformation set and the Duel at Naboo, is that the spacing on the bottom flat panels is very tight. I understand that it is not a perfect world and that lego is trying to hit certain price point with their sets, but it is ridiculous that the center support for the black medical droid can't be 2 mm longer, the flat bottom panels can't have another row of studs.
For anyone who doubts my building acumen, I have built these sets for 30 years and am quite comfortable with them. I will say in closing that the days of the large bottom panel that came with the Castle and Pirate sets of old are sorely missed and that a production solution for lego would be to use more recycled materials than they are (found in their own sustainability report)."