I have it in my garden growing at the side of my steps i rather like it, it softens the edges and i saw in a garden ing book once that if you dig it up in slices and turn it over you can line your hanging basket with it and it looked very nice.
BUT, i would not like it in my lawn, but it looks good on SOME of the rockery stones ,i just pull it out if i do not want it somewhere, it started out as a houseplant that got on my nerves and now i love it in the garden.