I’m starting HIIT workouts and need an elliptical. The Commercial Elliptical Ntaifitness Superfit-7007 from Ntaifitness looks smooth and affordable. Matrix Fitness ellipticals are great but pricey. Anyone using the Ntaifitness Superfit-7007 for HIIT? How’s it for Conditioning Equipment? I’m doing 20-minute sessions. Any HIIT tips?