I personally own the heavies and the mini bands. One of my partners owns the light and mediums. I would always suggest the mini bands (so much you can do with them) and the lights or mediums.
What do your best lifts look like in the squat and bench press?
The first one is hilarous...unless you were me going through this. When I stand up with the bands...it pulls me back HARD!!!! You may have to watch it a few times...laugh a bit...and be thankful that it was not you...lol. Almost a wipeout...
The next video is of my last set of box squats. Speed has slowed and I have began to lean fwd more than usual. Maybe I should turn my feet out a bit instead of pointing them straight ahead..