Most websites say that they can't talk. This is sort of true, but I've realised recently that what I thought was two honks was actually Halo saying 'Step Up'. He's getting a little clearer, but for the most part I don't think I'll get any better then little honks that resemble words.
And Conures love to chew. I recently watched Halo chew all the way through the perch that he was standing on, then act all surprised when it dumped him on his behind. He'll also go right for anything that you're playing with that looks interesting and chewable. I've caught him trying to prise buttons off my expensive joystick a couple of times, whilst gleefully ignoring all his toys on and in his cage, so you need to keep an eye on them when they're out.
Otherwise, Halo loves to cuddle and is rediculously curious about anything you're doing. Sometimes he falls asleep in my bedsheets (and then grumbles and groans when you put him back in his cage so you don't squish him).
Finally, the contact calls break my ears. Thank goodness he only does it twice a day, when I leave for work and when I come back. I figure it's good to get it out of his system, because he's quiet for the rest of the afternoon/night. I'm safe because I have a fairly soundproof house, but try playing music or something and then seeing how loud it is from outside, because neighbors are heartless beings and will not hesitate to lodge complaints to the council because your featherbag is making too much noise.
Sun Conures all the way!