Yes, I have just bought a LG Tu575 from a seller on e-bay. The phone itself is great. Nice slim lines, great clarity on external & internal displays. The phone was supposed to be "unlocked" and it is, as far as cellular calls. It immediately recognized ATT as my carrier.
I am having a problem with the internet connectsions, and even though I have set up a MEdia Mall account. It wants to default to Telstra/Big Pond (Australian). Once I get this problem straightened out, I think I am really going to enjoy the phone.
I would recommend it to anyone, but perhaps purchasing through a carrier would make it much easier from the beginning.