What do I mean, you ask? Well, there's some pieces that are too damn small to be working with at this level. For example, the RX used pre-constructed skirt pieces, but Bandai made it a little difficult this time around by having the front skirt armor a piece of a normal frame, and the balljoints are VERY hard to cut off because they're so small. One of mine broke, unfortunately.
Also, there are pieces used in the constructed for the front torso armor that are very hard to pop in, and the cockpit gimmick, while interesting and well detailed, is difficult to close completely. There are a pair of wrist pieces that are extremely loose and are supposed to peg in, but have no place to do so. However, those are only small complaints in an otherwise smooth building process.
I commend Bandai for making the tube segments EXTREMELY easy to work with, as they don't even require clippers to get off. There are two springs in this kit, and there are two different sizes of tube pieces. Even the smallest pieces, used in the head, are easy to push on and keep in place. Bandai has made sure that no glaring spaces appear in between these pieces either, which is very nice. Let's take a look at the Zaku next to his predecessor, the RG RX-78.