pre-configged CS boxes are always best avoided...for several reasons...
1. Theres no gaurantee it's a good quality server could be oversubscribed and prone to glitching.
2. That site says 1 year CS is provided...no gaurantee of this, the site could disappear or go offline tommorow along with the CS server and you will have no comeback or chnace of a refund.
3. The recievers will almost 99% be locked down and passworded to prevent you from being able to access settings and cam config files, so if something goes wrong you have to go back to the traders...if you re-flash you'll loose your C-Line.
4. Commercial CS sites like this and CS server are more likely to be targetted by the authroities...so you could end up with a knock at the door...