I work for Progressive as a Claims Adjuster and will give you guys some insight on how they work.
Yes, we do try to nickle and dime you on stuff, but there is a standard for when we use aftermarket parts. Also any other business is going to try to save money any way they can, and Progressive is no different. Any vehicle older than 3 years or 36,000 miles is the only time we can do it, and only on non-safety or structural items. Why would you put OEM parts on a 97 Neon anyway? When repairing vehicles for claimants or insured, they have a network program with body shops in the area. The repairs are 100 percent guaranteed for the lifetime of owning the vehicle, and if not completely satisfied, fixed free of charge and the network will expedite your repairs. If choosing your own repair option, we will meet with that bodyshop, and get them to agree to our estimate and also give an estimated completion date. If they find hidden damage, we come out to do a supplement. We take pictures of everything, b/c you would be suprised how many body shops and people are dishonest (rolleyes)
I don't know how other companies do it, but Progressive is big in using the credit score to rate your premium. Ultimately we settle things in a fair and quick manner, while trying to save everyone money.
I am sure I am going to get blasted now...