I wanted something to thrive in the shaded earth beneath the Clematis wigwam in the ex-veg bed, so in 2012 I bought three small pots of this, otherwise known as Woodruff. It has very attractive foliage, sweet, small, white, star shaped flowers in April/May - and spreads. And I love it so far.
In May 2013 it has now engulfed the base of the wigwam as planned and is making its way into the rest of the bed which I am happy about - I think. It has bricks and gravel to stop it moving past the edges of the bed and so long as it doesn't engulf the Geranium 'Rozanne', the Lamium 'Ghost' and obviously the many Clematis, then I'm happy for it to roam anywhere within the bed.
Apparently it is also an insect repellant (I hope not to repel good insects) and can be used dried in pot pourri or fresh to flavour white wine and orange or pineapple juice. Very versatile!