I like most forms of the name Helen and this one is no exception. I think I slightly prefer Elin over Eline, but Eline is also really beautiful. It's very feminine, has a gentle, youthful sound but at the same time I have no problem seeing it on a mature woman, and it's very international. I suppose it would be easier to pronounce for an English native speaker than Elin, as I have an impression that the latter often causes confusion.