I have a 4-month old Yorkie who I take everywhere in my new Fundle. She loves it, hops in on her own even!! She's only 3 lbs. now, but at first I put a small towel inside to take up some of the room, but now she's in it without it, has plenty of room and burrows down inside and goes to sleep. It has pockets (unfortunately not closable, but deep enough) so I can put her leash, my billfold, and treats. It's pretty spendy, but well worth it for me.
-Review on Amazon