Game changer!
We started with one set & test played them with the carcassonne big box. One set is barely enough for the game with all the expansions, so we bought a second set (and then 2 more sets for our daughter's household because these things are awesome). They clip together very well & very easily. They stay together during game play, but they come apart easily when you disassemble them at the end. I have some triangle tiles (Halflings expansion) & two triangle will fit into one grid space.<br />We noticed that the edges of the grid affected our gameplay - we wouldn't play in a direction that needed a new grid put down. We started placing the next grid as soon as a carcassonne tile reached the edge of a grid (hence the need for extra grids) and our gameplay went back to normal.<br />These grid are awesome because it's impossible to accidentally knock pieces out of place, it's easy to shift the whole board when you need room, and you can get a little extra space to lay tiles by letting some grids hang off the edge of the table.<br />These were well worth the money!
Rating: 5 stars