I am using this device with model no 20150 and so far I am quite satisfied. Taking about my gaming experience I would say it was quite satisfactory. It smoothly runs game such as Mordern Warfare 4, Crysis 3, Assasins Creed, Devil May Cry, GTA Vicecity and some other games. however it did not supported games such as GTA 5 or Call of Duty Ghosts.
The internal DOS runs quite smoothly.
Processor is quite fast and composed.
However the inbuilt keyboard gets defective after intervals of few months.
Finally I am attaching few photos to make things more clear