Great ideas, and the two groups that work are fun to solve, but the grid doesn't work as a grid. Au, Fr, Be and Co, can all be swapped between the chemical symbol group and the internet country domain group, which means there are several valid solutions to the grid, when there should only be one. It would be almost impossible to stumble over the solution you've decided is the correct one, without being a mind-reader. Also, Ct isn't a chemical symbol for any element that actually exists (Centurium was a name proposed for element 100, but that was rejected in favour of Firmium).

Good categories/links, but it needs a lot of editing. There's one wrong/completely made up answer, and two pairs of answers that could be directly swapped between two groups, so it doesn't work like a real wall, with only one solution, and can't be solved in the time/number of lives. Frustrating because the it could have been really good.

Nice groups, but let down by too many swappable answers. Not a good grid.