"what benefits is it rooting ur device "
-you can get more control of your device, and install specific apps that require the root access.

"how easy is it rooting ur device"
- it depends from device to device, but the rockchip based ones are fairly easy to root for someone ho knows how.

"and would advise rooting ur device"
- again is something that depends of the user, if you want more control, and you intend to do more with your device than the rather usual stuff, yes.

"and could someone give me a run through step by step in how to do or if u have a link "
- There is no step by step guide for this tablet available

The usual flashing scenario is:
1) Download rockchip batch tool
2) Download the firmware
3) Get the tablet in flashing mode and install the drivers provided in the rockchip batch tool
4) Flash the firmware with rockchip batch tool, using the RESTORE option

Check also this topic for more information regarding the flashing method
http://www.arctablet.com/blog/forum/archos-arnova-general/possible-fixes-and-repair-methods-for-your-rockchip-tablet/