I have not owned or even shot one, but I have read two reviews on them. They are a close copy of the Rem. 870. "Close" means that not all parts will interchange, so if it breaks your local gunsmith may not be able to fix it easily. You can get choke tubes for it, I believe that one article said Mossberg chokes will fit it.
I know the price makes it look like a great deal, but as buttonbuck said, the Remington 870 Express is only a little more. And any gunsmith can fix it, in the unlikely event that it breaks. And you can really customize the 870's to be exactly what you want because every manufacturer that makes aftermarket equipment does so for the 870.