sorry i done graduated the hyper7 category a few years ago .....id never give that car up .....out of the three the jammin the 777sp1 and the prospec the prospec is the easiest to drive atleast indoors it is...the jammin works well but i havent driven it much yet...i grazed a wall with the jamin and broke a rear upright last week in my opinion way to easily so i used a set of 777 uprights as an upgrade they work perfectly my guess is the jammin is gonna haul ass outdoors it jumps and turns very nice....the 777sp1 is typically a back up car for the mugen its just slightly harder to drive