We recently purchased a 05 Eagle to put on an 03 Tundra. It is a really good fit front-to-back and aligns with be bed rails perfectly. However, you do lose about 6 inches total (3" per side) on the floor, because the camper floor width does not extend to the width of the truck bed. We have the "pull-out" couch, and the walkway is just too small for 2 people to sit around a table, so that means we eat either eat outside or hold our plates "in hand".
The most frustrating part about the Eagle (for us) is the pullout bed. When extended, it eats up a lot of the internal "living" space and also covers up the stove. That means in order for us to do any cooking (or even make a cup of coffee), we have to wake the other person up, get them out of bed, push the bed in (and deflate our air mattress, which might be slightly more unique to us), and then we can finally make coffee. Sleeping east-west is the one thing that we really wish we had the option for so we could avoid all that hassle for cooking and living space.