Millie stopped using her crate at 5 months. She's 6 1/2 months now.
She was never a fan of it and wouldn't volunteer to go in it. But she made it clear that she liked to sleep on any mat/bed available. We have a folded up blanket on the floor in our bedroom and when we're in there, she'd lie on it and jut wait. So one day I took the blanket into the hallway to see if she'd still like to lie on it. She did.
I left it there for a couple of week, put a towel over it and made it into her bed. One night I decided to take the plunge. Put her on the bed and she slept there all night without a murmur. I closed off the lounge area, so she only has access to the hall landing, hallway and kitchen.
Soon after that, we started leaving her in the same area during the daytime. Its the cool part of the house and I was worried about her getting too hot in the lounge which is south facing.
Its been a very smooth transition. I just make sure she has plenty of toys and special treats when we go out. When we come in, invariably she comes running downstairs, so I know she's been resting on her bed.
The only downside, I've lost my winter blanket from my bed