DD(7) would pick Test Track (but unfortunately with FP+ tiering - our FP is now going to be limited to Soarin, so it will be hit and miss whether we even get to ride Test Track depending on the Standby line). Test Track is a headliner. I wouldn't call Tomorrowland Speedway a headliner. It is your old fashioned-car around a guided track. I loved that as a kid, DD likes it, but it wouldn't make her favorites list. Also, depending on the car you get- they can be really slow and hard to get moving. Some work much better than others. We got a total dud one time and it died in the middle of the track and would not start again, and a CM had to come mess with the engine to get us moving again. DD will ride the equivilant at DL (Autopia) because it is a regular paper FP there. It was not a FP ride at WDW, until FP+, so until recently it was standby or nothing. Typcially at WDW, the line can be really long and some trips we totally skip it because she doesn't deem it worth the wait of the line. She also doesn't deem it worth burning a FP+ on. It is not a must do for us. To her it is fun, but no big deal if she skips it.