I am using DELL Inspiron 15R i7
Overall the system is running smoothly.
Over the course of some months , Internal speakers are can not provide proper voice.some minor disturbance is coming with songs.
Main Disadvantage is , dell not given any CD of operating system that you have to make manually from the BELL BACKUP AND RECOVERY software is comes in built.
So if you want to format the pc you have to keep back up of the OS. In case or anything goes wrong with the system and you not taken backup before , then you must spend money for system reinstalling. Accepting above points the system is very good .