They help me with anything I need.
I have home, auto, life, umbrella and some special property coverage (jewelry) with them. Anything I need, I just email them and they make sure it gets taken care of.
If I buy a new car, I just email them and they take care of adding it to my policy. If I get into an accident, there isn't any sitting on hold or anything like that, I just email them and the adjuster calls me and lets me know what I need to do. The last accident I had (someone rear-ended me) all I had to do was send them an email, the adjuster called me and got the details and then I took my car to the body shop and picked it up when it was ready.
If I need to change something on one of my other policies (like a beneficiary or something), I just email them and they send me the exact forms I need and even fill out whatever they can for me.
My wife accidentally flushed her engagement ring down the toilet in a hotel once. I emailed my agent, she had an adjuster call me and all we had to do was pick out the replacement stone and setting and they took care of the rest. Super easy.
I might find service like that with another insurance company, but I would have to start the relationship from scratch. I've been with my current agent for over a decade.