I got a quote for one recently - $214 for 1 million umbrella, bundled in with our home/auto. I'm still debating. While we do have well over that in assets, we are super low risk to actually ever need the extended coverage an umbrella provides. The first I heard of them was on this forum.
It's just me and the hubby, no kids. We drive basic cars, 1 is over 10 years old, the other newish but a base model and are safe drivers - never caused an accident and no tickets for anything. We barely get 5k a vehicle yearly as we don't drive a whole bunch in general. Own a small home in a working class neighborhood and no other property. No fancy watercraft or off-road vehicles, dogs, trampolines or other hazards. We don't have that many people over to the house. We're actually kind of boring when I think about it. ;)
I know that logically it makes sense for that "just in case" and it's not that much to pay, but it irks me that in the event that we were sued, the lawyers would see the umbrella and go for broke.
But probably later this year, we'll be opening an umbrella just for the peace of mind of having it.
But from what I've read recently, umbrellas are highly recommended on MMM forum, if you have enough in assets to justify getting one.