One particular advantage of adding endorsements rather than seeking coverage through a separate insurer is that you have all of your coverages in one place. Furthermore, if you have, say, home and flood insurance with the same company and you need to file a home and flood claim, some insurers may only require a single deductible for coverage to kick in. Some endorsements that are indicative of a good homeowners insurance company are:

USAA only sells policies to current and former members of the military and their families and is consistently rated at the top of its class by A.M. Best with an A++ financial strength rating. It doesn’t have an official customer service rating with J.D. Power, but USAA is noted by J.D. as providing “claims satisfaction and shopping satisfaction”. A perk of USAA is if your uniform is damaged or stolen in an event your policy covers and you are on active duty or deployed, USAA will reimburse you without you having to pay a deductible.

In managing the claims handling function, insurers seek to balance the elements of customer satisfaction, administrative handling expenses, and claims overpayment leakages. As part of this balancing act, fraudulent insurance practices are a major business risk that must be managed and overcome. Disputes between insurers and insureds over the validity of claims or claims handling practices occasionally escalate into litigation (see insurance bad faith).

Allstate: Allstate is the eighth-best insurance company, with many Allstate customers in our survey reporting that they didn’t feel like they were in good hands. Allstate customers were particularly unhappy with the value they felt they got from Allstate, with many of them saying they wouldn’t recommend Allstate and didn’t plan to renew their policies.
Methods for transferring or distributing risk were practiced by Chinese and Babylonian traders as long ago as the 3rd and 2nd millennia BC, respectively.[1] Chinese merchants travelling treacherous river rapids would redistribute their wares across many vessels to limit the loss due to any single vessel's capsizing. The Babylonians developed a system which was recorded in the famous Code of Hammurabi, c. 1750 BC, and practiced by early Mediterranean sailing merchants. If a merchant received a loan to fund his shipment, he would pay the lender an additional sum in exchange for the lender's guarantee to cancel the loan should the shipment be stolen, or lost at sea.