I learned about crate training almost 30 years ago with a Sheltie I got as a pup. Have been a fan of the entire concept ever since.
We just got Gracie a week ago, and while we were told she didn't require a crate we found that she seemed to seek out things to get under (tables, desks chair legs). She's still getting used to the "city" sounds around here. She's always lived in the country prior to coming here from Missouri. She's a little timid about all the strange sounds. On Friday we decided to get her a crate and she seems to love it. It's where she goes for naps or just to lay down. She'll go to the crate when she's startled, then come back out again when she's feeling safe again.
I realize this type of crate wouldn't work for a puppy who's still "teething". But for an adult with a super sweet personality it's perfect.