Lady's mantle

I saw a bag containing this in my local Poundstore which didn't contain just the usual withered roots and dry-as-dust compost, so I bought it to give it a chance, especially as the picture on the bag showed a very attractive leafy plant. The "blurb" said that Lady's mantle can be used as a ground cover plant and will outdo any weed. The question in my mind, though, is whether it might become something of a weed itself. The aforesaid picture shows it growing in a pot and that's where I've put mine until I know a bit more about it!
Has anyone grown this plant who might be able to offer a few tips?

 

I have never grown it myself Jack, because I can't see the point of green flowers. But it has a RHS AGM (award of garden merit) and its popular with the presenters of gardening programmes, so I think that it is reasonably acceptable.

I understand that it will self seed, but so will many of the best garden plants. http://www.bbc.co.uk/gardening/plants/plant_finder/plant_pages/25.shtml

 

Thanks very much for the info.
Self-seeders I can deal with; it's the ones that reproduce beneath the soil that I try to avoid.