I've used this mower twice, and it works great. The only issue I've run into so far is that the metal bar where the clip is to lock in the handle or fold the handle for storage, arrived bent. I'm able to move the handle into place with a little force and lock it for use, so I'm not too worried about the damage.
In terms of performance, so far this mower is running great. Self-propel works well, blade stop works well, starts up easily, mulches the grass really well. I'm only knocking off a star because of the damage, but I can probably fix it myself by inserting a rod into the metal tubing and tapping it with a hammer until it's straight.