Spring Week to Summer Internship

I managed to get onto 3 spring weeks with BB's, despite being from a non-target university. Because of my success rate i didn't realised how much of an achievement this was with around 2000 applicants for around 100 places on average.

However, 2 of these sw's have definately not been converted into internship and one I will find out about this week, although it is much less prestigious than the other two and I didn't really enjoy the culture.

When applying for summer internships in autumn, will it just look good that i have 3 BB's on my CV? or will they wonder 'why didn't she convert these into internships?' and could it actually hinder me? I do also have a summer internship this summer at one of the largest asset management firms, so that will be on there too.