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Edit: I have been flying these with Dal Cyclone 5046 and I really like the torque they provide on low throttle, they seem to be more than able to work with heavier props.
I have found this youtube review with thrust results https://www.youtube.com/watch?v=l3fxHBEovZM and they seem to pull 1400 grams and drawing around 40 amps on 5046C at max throttle.
You are getting what you have paid for. These motors are certainly a bargain for a cheaper builds and also as motors used for training without worrying if you destroy them. I have ordered these as soon as they were available for sale on BangGood. I was worried a bit since there were no reviews, but based on my previous experience with Racerstar motors, I have decided to bite the bullet and order them.
You can get these on here: https://goo.gl/RYwkUJ
My review of these motors: http://lll.mk/multicopter/racerstar-br2307s-2500kv-review/