I wasn't sure what to expect with turf... I got it for my dogs during winter to make walking on the patio easier. The drainage holes at the bottom seem to work in letting extra snowmelt and waste flow out. If it were, on gravel or decking I think the liquid drainage would be even better.
Some products claim to have looking turf. Is that really possible? This one looks just like I thought it would. I poured a gallon of water on it as a test and within 30 minutes the messy splashing water puddle effect had completely disappeared, seeping through the product and down the patio slope.
I'm really pleased with this purchase because it does what I needed. It's a value though it still resembles grass. After two and a half months of rain and snow I've cleaned it off times and haven't found any lingering bits of green "grass" stuck to my shoes or tools.
I'd highly recommend it if you're okay, with fake grass looking like grass.