I'd be using it to ensure that my internet speeds remain consistent, and currently I would be using it to prove that my upload speeds are lower than they should be.
This may be an outlandish idea, but how about an option to continuously speed test every x minutes or hours. Currently I have to vnc into my raspberry pi every ~24 hours to set up the speed test.
It would be really useful to be able to run it non-stop.
Thanks
Nikrox