They all suck, they all deny unreasonably, and they all scam when they can
get away with it.  Insurance is so heavily regulated that you're better off
just shopping price and coverages rather than trying to evaluate
"reputation."  Whatever reputation they have today could change next month,
and probably will.

I would, however, avoid small companies of uncertain financial stability.
If they go under when you need it, your claims are likely to be left in
legal limbo for a very long time ($20K for over 2 years when that happened
to my sister).  Meanwhile, the people you owe will still want their money
now and you will be obligated to pay it.