In the '80's, a friend and I were getting a place together. She was living with a different friend, but needed to move and wanted to have a place where she could have her large dog, who was with living at her parent's house.
The prospective LL called and asked to see her current place. I happened to be there. We suggested the LL come over right away. The house was spotless, because her cleaners had been there that day. Of course we passed with flying colors. Happily, it turns out the dog was fine,
we were reasonably clean IRL, and we had good jobs. I ended up keeping the place for ten years, long after the first roommate moved out.
We proved to be excellent tenants despite the dog, but the successful home visit was just lucky timing.
BTW, I date stamped this, because I'm not sure if it's even legal to ask this any more.
Some LL's swear by checking out the condition of their vehicle, inside and out.
Oh, and I once dodged a bad apple with a good credit score because I caught the words "Authorized User" on his credit report. Thanks to this forum, I knew to dig deeper and his carefully constructed house of cards fell apart.
Pay attention to the details and trust your gut.