Compare ideas for a present Speaking

Marta: How long will yo be, Laura? Can we go now?
Laura: Not yet. I'm looking for a poster for my dad. He's into art.
Marta: Can I see?
Laura: Yes. What do you think for this?
Marta: It's OK. Who's it by?
Laura: This one's better.
Marta: Do you think so?
Laura: Yes, it's more interesting. The other one's a bit dark.
Marta: Yes, I think you're right. Thanks, Shaun.