As stated above - the only two problems with the car are DCT and MFT. If you get a model with justa radio and manual trans, you won't have ANY problems with it!
With that said, it's definitely on the smaller side of the class. The Fit, Sonic, Versa ... have significantly more space inside - both front seat and back seat.
The Spark (next size down!!) has more leg and head room than the fiesta. Fiesta has much more driveability and cargo room, though.
It is a variable valve timing, DI engine, so I'd avoid the recommended 10K oci intervals unless you get it analyzed. They are a lot of fun to drive, for what they are!