Worked well, I would buy again.

Use: extending the parking area Easy to use and simple to fill. I found that lightly placing a shovel of gravel in each chamber gives the best results. Add more gravel as a few chambers fill up. If you are too aggressive the Grid can lift and stones get underneath. It's a bear to get it flat afterwards. Strong and lightweight. I will be buying more to use as a shed floor instead of concrete. Much easier to work with. The grid was easily cut with heavy scissors. I held it in place and stretched out with 12" pieces of re-bar. I pulled the grid out of the box the day before to let it 'relax'. I suggest you do the same. Stretch it out fully before moving into place.