I have the Onirii pedals. They are light, and felt great when I first got them. Yes, they had to have been packed with grease because they did not self level as quickly as I would like. Then one side (right side) started to really open up, and the other didn't. So I tried taking the nut off the right one, and kinda stripped it using a regular box end wrench. What I figured out was that 1. I needed to use a 17 socket. AND 2. This is the most important thing, the right pedal is backwards threaded, just like the spindle, so it would have never come off going the way I was trying. I was able to take the entire spindle out of the pedal and am currently servicing it. When I first started riding them, I was over 200lbs, and never had an issue.
When I THOUGHT I had ruined them, I bought the other set, the raceworks:
http://aliexpress.us/item/3256806196965435.html?spm=a2g0o.order_list.order_list_main.59.531a1802laRgsz&gatewayAdapt=glo2usa. They are fine too, just a little heavier but same play and action.
I always had ridden the Speedplay pedals, but thought I would give the SPD pedals a try. Six of one, half dozen of the other. They are all just pedals.