As someone who was very involved in developing the Kitty Hawk UH-1D, I know of some of the shortcomings of the kit. Some things that were not able to be addressed or were caused by the limitations of the plastic. Some things are just better in photoetch.
The key about these Big Ed sets is that they are a one stop shop for a kit. Not only are they a one stop shop but they are discounted significantly than if you were to buy the sets separately. In this case the saving is almost $20.