I ordered P90X today, and I have no doubt that it works, but I just wanted to know if it's hard to eat the P90X diet and what kind of food is on there? Also, I've heard there are a lot of fruit restrictions, can you eat grapefruit, because grapefruit is my favorite and I eat 2 or 3 a day. Also how necessary is the pull up bar, because I don't think any of the door frames in my house are sturdy enough for a pull up bar, are there any other alternatives?