Take note, it is Hagerty, not Hagarty.
There are only a few major players in the "Classic and Collectible Car" insurance category. Hagerty is a big one, so is J.C. Taylor, and there are a few others.
Here was my experience and why I chose Hagerty. (Ignore the fact that they are a Michigan company)
My wife works for Ford, and as a manager there for the past 15+ years, we pay for (it isn't free by any means), and receive, "management lease" and evaluation vehicles every year. It started with a single car, then went to two cars per year just around the time my W113 came out of restoration and was ready for the road. Thus we do not own any daily drivers and have not for at least 10 years. Aye, there's the rub, as they say. These lease cars are not in our name. The cars are self-iinsured through Ford, so we don't have insurance on them either. We're merely caretakers and provide feedback and evaluation on said vehicles quarterly.
No other classic car insurance company could deal with this conundrum. They all require, as part of the provisions of classic car insurance, that you own and insure a daily driver--a normal car. This is so you are not driving the classic as a daily car.
Hagerty, on the other hand, took a letter from Ford's HR Department describing the situation and my family eligibility for these lease cars, as proof that we had other cars to drive regularly and thus the 280 SL was not going to be used as a daily driver.
J.C. Taylor and a few others would NOT offer me insurance under this same situation...and that is why I have Hagerty.
By the way, their on-line service, and their office staff is exemplary. Top notch--quick to answer, ready to serve. I am thankful my experience with them are merely getting the insurance certificate every year in order to get the car re-registered. I have had no claims. They have no mileage restrictions or usage restrictions on my policy. Some classic policies (and the Michigan antique license plate) have various restrictions such as only valid for use to/from club events, 2500 miles per year, and similar restrictive issues.