I LOVED having a bucket when DS was just a babe- it was so convenient to be able to carry him around in it when he fell asleep in it. You just can't do that with a convertible seat (like the True Fit).
We had the Chicco KeyFit 30 and thought it was great. A breeze to install, and easy to get DS in-and-out of the seat, and easy to get the seat in-and-out of the car. DS is also a tall kid (95% for length) and he was able to stay in the bucket for 9 months. It got heavy, sure, but I never thought it was TOO heavy. No regrets whatsoever, and I actually miss the bucket many days.
Your friend really needs to decide first whether she wants to get a bucket at all, or just skip that step and go straight to a convertible. That's the big decision before you start looking at specific brands and models.
Sleepy mama to Colin Theodore 8-12-08 and Trevor Arthur 7-17-12.