Comper's GUI Pack is a resource pack whose purpose is to make the Minecraft visual experience more complete and immersive. As you can tell from the name, this is a user interface focused package, so you won't find anything but a brand new GUI for the game. Due to its nature, the mod is not necessarily meant to be used independently, which is why we recommend using a resource pack with a similar art style so that the two things can be connected together for more fun.
Comper's GUI resource pack is designed to maintain a modern setup. The pack doesn't overdo it visually, so everything looks simple, clean, and elegant. There aren't any fancy colors in the package, nor are there any unnecessary details in the interface, which is why it's easy to look at. It's worth mentioning that the lack of colors does make compatible resource packs difficult to find, but this is a fairly minor issue as players will have to find the perfect resource pack to use this pack as long as they continue to search.
The resolution of Comper's GUI resource pack is x16, which is why it is highly recommended that you use the same resolution in this pack. This game pack does not have any negative impact on the game's framerate, as it only focuses on the game's user interface, and the GUI's textures are hardly responsible for any in-game performance degradation.