Just the fact you are trying different things and the desire to improve will make you improve. We have a slipping bag at the club because my partner is a consumer and likes to buy things. I didn't learn to slip on it, and for the beginner it might be confusing. I like to set up the rope and have the boxers moving forward and backwards with the punching while they slip under the rope. Maybe you allready have done this and need something more advanced. Therefore the slipping bag would challenge you more.

OldTownBoxing