These two partner assisted pull-ups are a great option to ensure full-range of motion and individually based assistance.
Most lifters struggle with finishing the movement by getting their chin over the bar. Although many use bands for assistance, a band won't help you where you need help the most: at the top. Also, partner assisted pull-ups allows the person that's assisting to dictate how much help is needed.
It's possibly the best exercise, but nearly everyone does it wrong! In addition to explaining how to troubleshoot your lunge, this article provides enough slick variations of the movement to turn you into a lunging fool.
Now it's time to take a closer look at the smallest functional unit of training parameters: the repetition. If you build your repetition quality, you'll reap more gains from your workouts. That's definitely a good thing!