This particular edging is very popular and of course is an ideal compliment to any grassed surface.
The main benefit of this style of kerb is having a large inside edge. This prevents garden beds and their contents sprawling out onto the grassed area over time.
Also having a very defined visual seperation between grassed area and garden beds provides a much more engaging look and feel to any garden.
Please take a look in the gallery section for more examples of this and other kerbs.