xm radio portable unit (Pioneer Inno)?

Hey everyone... I just started a new job in a factory... really close to home and I hope to move up in that company within the next year... After our training is finished we are allowed to wear MP3 players... I want to know if you think the new XM Radio (Pioneer Inno) would work inside the factory.

Its a normal factory building with a normal commercial roof. No windows in the place but I live in the midwest in a small town so I dount there are any terestial boosters around... I love XM and think it would make the 10 hour day fly by if I was able to listen to my XM radio in the plant.

Do you think that it would be a waste of money, or would this work in the plant?