They are workhorse movements that are very good. The Asian movement works very well and I have never been let down.
As already mentioned, they can run well for a while unserviced, but often not much care is given in oiling and generally cleaning the movement in the rep factories. It is advised, if you intend to keep the watch for more than a year, to get it serviced. In that sense spending another 200 bucks is not too bad.
Some A7750 may come dead or run badly when it first arrives, but that is one of the first lessons in this game, a rep is a rep.