Def a good thing when its forwarded to someone who can do something about it. Hope it comes out good for you.
The reply may be a formal response, as the company is likely receiving hundreds if not thousands of these requests on a daily basis. But that does not mean your letter is meaningless or ineffective.
I have had some success with a GW letter. In one case, I got a response basically telling me that the information
the lender reports, by law, has to be accurate. It appeared to be a flat out denial. (I had 3 lates, spread out over just a few years) A few weeks later, when I pulled my CRs, the lates were removed!
With so many businesses citing law, even while they break the law, don't be surprised if you get a denial. If so, keep pushing and try again in another 1-2 months. If you haven't already, immediately set that account up for auto-pay. This sends another message to the co that you are that you are serious about keeping your payments up.