When considering designs, it's important to think about how easy they are to use.
1) How much precision does it require? Try approaching the game piece from various angles.
2) Do you have to be a certain distance for it to work? Can you always easily guarantee the necessary distance for your system to work?
3) How easy is it to use if you're trying to use this design on the other side of the field (or half field this year) with other robots and game elements obstructing your drivers view?
There are lots of questions that need to be answered while analyzing a design. Hopefully these will help you get started
