planting in black polypropylene woven groundcovere fabric

 did you see on gardeners world two weeks ago a man from Wales putting his plants in black polypropylene obviously making holes in the poly sheeting prior to planting

and I have to say this method looked pretty good keeping  the weeds at bay and using this type of plastic means that its breathable so allowing water to pass through the poly sheeting

but  not sure  how to keep slugs at bay using the poly sheeting should one put the slug pellets under the sheeting prior to planting or in slug traps on the surface of the sheeting after planting

what's your thoughts on this method of planting 

ive done that for a few years now       no weeds is great

thanks all for your replies that's convinced me to go with that method next year I had thought about planting in poly sheeting this season but wasn't quite sure 

Mark out where you want to plant, (I use white emulsion), then cut the cross with a "hot knife", I use my soldering iron, this stops the woven plastic from unraveling, (usually, lol)

A blowtorch or weed-wand work pretty well too.