Some other things about the twins I'm not sure have been mentioned.
* Carole has said at least twice by now that they're smart.
* In the same Friday morning live when the twins were exercising with Nicky, there was an interesting talk about the twins between Ziggy and Carole. Ziggy said that, even though the twins spent a lot of time with mirrors, they never seemed vein. Carole agreed and (I think this was also Carole) mentioned that much of it was working out dance routines etc and that they were always very attentive when you talked with them.
* Though they have a rep for just jumping about and not having conversations (thanks to the "highlights"

), it's not true. For example, they had a long chat with Chanelle Thursday(?) in which they and Chanelle exchanged stories about various incidents in their lives (as you do when getting to know someone).
Someone mentioned somewhere that they knew more about that twins than about most other HMs, and that's true for me as well. There was the talk about which one was best at Maths or English etc mentioned above, where they also talked about fashion and other interests. I know what they study at university (I don't for Chanelle), that they want to go back after BB (after maybe a year off), that they like the case studies they learn about but find social policy boring.
* They out-acted Emily when playing charades.
* Someone mentioned somewhere that the twins were important for Chanelle's state of mind in the house, and I agree. There's the conversation I mentioned above, times they've played around together in the garden. But I think it's also true for Nicky (for instance exercising and running around with her in the garden Friday) and some of the others. I think that having these upbeat, positive, vivacious, and helpful young women around has made BB life easier for both Lesley and Carole, for example.
In fact, the twins tick a lot of the old-fashioned "good housemate" boxes: they're enjoying the BB experience; they pitch in with chores and haven't complained; they haven't been bitchy or two-faced; they haven't formed or joined a clique or gang but instead get along and interact with everyone, young or old; they're entertaining (easily the most

- and LOL-inducing HMs in BB8); they think of things to do and keep other HMs from just lazing in the sun; they listen to others rather than talking over them or imposing their views; they don't go on about what BB might do for them; and their talk isn't confined to BB and popular culture (though of course they do talk about clothes, makeup etc).
They probably will eventually show that they aren't always only sweetness and light, but I don't think it's possible to seem so upbeat, energetic and nice, for this long, without really being upbeat, energetic and nice.