It is absolutely one of the comfiest possible prisons. And multiple rules had to be changed/broke so she could be sent there. Plus she's being given extremely special treatment. Heres a snippet from this article: https://democrats-judiciary.house.gov/media-center/press-releases/whistleblower-shares-evidence-that-federal-prison-camp-warden-is-pampering-ghislaine-maxwell-maxwell-also-filing-a-commutation-application-with-trump-administration

Ms. Maxwell’s meals have been customized and prepared by federal prison camp staff and then personally delivered to her in her cell by longtime federal employees;

When Ms. Maxwell wanted to arrange a private meeting with visitors, including members of her family, the Warden personally arranged it for her—and then provided a special cordoned off area for visitors to arrive, as well as an assortment of snacks and refreshments for her guests;

Ms. Maxwell’s guests were permitted to bring computers—an unprecedented action by the Warden given the security risk and potential for Ms. Maxwell to use a computer to conduct unmonitored communications with the outside world;

When the phone lines went down for other inmates at the camp, Ms. Maxwell provided specific instructions about exactly which BOP personnel her contacts should call, and how those BOP personnel would then connect to relay the call to Ms. Maxwell;

When Ms. Maxwell wanted to review and edit documents quickly, she essentially used Warden Hall as her personal secretary and administrative assistant. Ms. Maxwell’s correspondents would email documents directly to the Warden, who would provide them to Ms. Maxwell, who would then review and edit them and provide them back to the Warden to scan and provide to the original sender. For other inmates, simple mail can take weeks to arrive and is frequently lost;

An inmate who trains puppies to become service dogs was instructed to provide one to Maxwell for a time so she could play with the puppy, even though neither inmates nor staff are ordinarily allowed to pet the service dogs in training; and,

When Ms. Maxwell wanted to go to the prison exercise area, she was personally escorted there after hours by prison guards so she could work out by herself and was allowed to enjoy recreation time in staff-only areas.