Just short of two years ago I started Deadlifting. I started by doing a set of 12 and got to 225lb. Then I switched to 8 reps, but my grip failed at around 245lb for higher reps, and so I started using straps. Without deloading, I got to 8 reps of 385lb, which granted took six months of adding 5lb each session. After that I deloaded to 8 reps of 200lb for 2 sets. So six months later, I pulled 8 reps of 375lb for 2 sets.
At that point, I pulled 405lb for a single, and about a week later 420lb, which injured the middle of my back to a minor degree. The lift was fine, but I held the weight too long. A couple weeks later, I pulled 425lb, then 435lb, and more recently 450lb, and will break that in 2 weeks time.
The Deadlift has corrected my posture to be more upright, made me stronger in all other exercises, developed my back muscles significantly, and have helped build my endurance. I have not yet used a weightbelt with them.
The technique I use is a very narrow stance with the heels touching each other. My grip is just between the rings. I start on the ground with the weight rolled forward, set my breathing, and roll the weight back into myself as I engage my Hamstrings and Traps and lift the bar until lockout, shoving my hips forward, and squeezing my Triceps, Biceps, Pecs, Quads, Glutes, and Abs.