Frently Avis 

Denise does disclose any real facts about herself and her service.
They appeal she files on your behalf you can file yourself easily for free.
The process which follows takes months if not years.
Denise is not an attorney, therefore she cannot represent you if your request is legally challenged by your landlord.
You can not change your mind about being involved with Denise. She has successfully sued both customers as well as people who offered similar services.
Denise pretends to care but in all reality this is her bread and butter and she makes her money filing enormous amounts of automated appeals and gets her large 1/3 cut of every amount of paid out inflated service costs or rent in excess of legal limitations. You can do better!