I just finished building most of this kit. So here's a bit of mini review for this. I'll just talk about my build experience with this kit for now.
The kit looks really good overall. I guess I got lucky since my kit didn't have any defect unlike some that I've seen around my gunpla groups. There were others that had defects like parts not fully molded.
Snap building the kit required a bit more strength since pegs are a little too tight. This is something fixable if you can spend more time on the kit.
Upon closer inspection, this is where the imperfections and issues become more noticeable. One of the issues that stand out for me are the uneven panels. The MG RX78-2 ver. 3.0 is known for having too many pieces on the armor parts for color separation. The Bandai kit doesn't have problems with this since the pieces are supposed to line up and level with each other.
The issue with the Daban kit is most likely due to the manufacturing process where pieces aren't molded as well as they should be. Hence those hairline gaps between parts. Also due to the quality of the manufacturing process was the tight pegs that either require more force to fit or actually prevent parts from fully snapping together. One example would be the pic of the knee armors directly above. The upper knee pieces should fit flushed with the other knee parts but they can only go so far. It's the kind of things I notice since I already have experienced building the Bandai kit.
The knees and elbow joints are extremely stiff. When I got this kit, my 1st worry was the arm construction. The kit's arm construction is a bit complicated and hard even on the Bandai kit. Extra care should be taken in building the arm on the Daban kit and make sure that parts fit together before fully assembling so you don't break any part.
Another selling point of the 3.0 kit is the sliding panels. Though the fitting issue in this kit can be considered minor, it does affect the sliding panel gimmick in most areas, specially in the leg and arm parts. The panels on the Daban kit barely move though it doesn't affect articulation. And since the joints are stiff, care should be taken in moving them so as not to break any part of pop off any piece.
Also take note of the Daban kit's leg joint. Specifically the rectangle armor piece behind the knee. The knee joints are hard to put together due to the tight pegs so it'll be hard to fit everything together. The rectangle armor piece behind the knee tends to keep popping off whenever the knee joint is moved. This can be fixed easily by taking time to fit the knee pieces well or by gluing that piece.
Daban's articulated hands are also hard to build. I actually broke one of the fingers. I prefer Dragon Momoko's version if not Bandai's. Daban's articulated hands joints are still too stiff and brittle, there's also a lot of flashes that sometimes gets stuck to the joints that cause them to break when moved.
Considering the price of this kit, it's hard to expect that this won't have any issues. Good thing that the issues I've encountered with this kit can easily be fixed of one takes his/her time assembling this kit.