In reply to string arms: Well almost any runner will benefit from hill reps, there is little that is more effective.
2 points I would make - this is physical training, not technique, so I would find a hill that's not ludicrously steep, and that you can run up without needing to break stride at obstacles.
Secondly two minutes is a long hill. I suspect you would benefit from reducing the lengh to something like 250m and doing 8 or 10 of them. Maybe after you've done a few sessions you can make one session in 3 of longer reps. As an example, for many people the ideal thing for hill reps is a big road bridge (in steepness and lengh)
Your jog down sounds ok. You need to be able to recover a bit, there's no point being a hero and going down too fast if you can't complete the session properly. You should find them all pretty hard going.