Mountain Bikers help me with you knowledge!!!

[Vdub13799]

Looking at getting this guys http://www.decathlon.co.uk/81-2011-id_8168695.html 

Just after some advice, I'm a newbie to this but want to start cycling to work and the occasional forest day now and then. Has really good reviews and has a high spec for the price. Whats everyone's opinion or can you recommend something else?

Thanks everyone!!