May be Chinese made and relatively cheap (compared to other big name brands) but this thing sure does behave just like all the name brand ones that I have used over the years. Used on three jobs for my new business and has already paid for itself 5 fold. Also used it with a thread adapter and smaller core barrel to install a pool guard rail for elderly in-laws. Browny points! Remote locations with no running water and works fine with a gravity feed water bucket. Tapped on the side of the core barrel when finished with a small hammer and concrete core fell out every time, like it should. Only down side is that the startup wattage requirement is high and you need a heavy duty generator to power it if you are at a remote location.UPDATE: used on two more jobs and still working fine. One site was just a couple locations, second site was over a dozen cores in both concrete that was 8+ inches deep and old asphalt. Worked fine and did not even trip the fuse when I got impatient and pushed down too hard.... did not realize how thick the concrete was at the site.UPDATE 2: still using it and still going strong after over a year.
N. Morales 
