So far I am leaning toward purchasing a Radian XTSL. I would like to know if anyone has used it RF in a Ford f150? Will it fit behind the driver's seat RF? Are your toddlers happy and comfortable with their legs RF with this seat? Have your kids ever complained about leg room while rear facing?
Experience RF with Radian XTSL?
Not quite the same, but we had a Radian XT RFing in the middle seat in an extended cab Chevy Silverado just fine. DH and I are both tall and it was not a problem. DD thought it was awesome since the window to the back of the cab was right in front of her so she could see much better than in our Tahoe :D DD is tall as well (~40") and had plenty of legroom.
Here's some info I found about the f150 (not sure what your model year is)