I use piddle pads ... I can just roll it up and toss it in the trash. Works well for my purposes ...
I have looked at the "grass" patches with interest, just because they look so much better. However, I question the ease of use: if all the liquid falls into a tray in the bottom, you have to pick it up and move it somewhere to dispose of the, errr ... "contents". PROVIDED I could get down to pick it up and not spill it, I would think I would be risking having the pan twist due to it's size. At any rate, what I'm asking of those who DO have the grass patches, how easy is it to pick up the catch pan and dispose of its contents withoug dumping it on the floor anyway - or wearing it

?