KIA pro_ceed 2.0CVVT Chiptuning

Hello ceed friends, Has anyone had experience with chip tuning with the petrol engine and makes sense? I am now six weeks proud owner of one pro_ceed 2.0 petrol engine. After almost 5TKM it is still very sluggish with the acceleration and the passage. Of 143hp nothing to be heard, always feel like pulling a trailer!!! then at KIA the driving performance has claimed but everything OK! (0-100km 9,1sec. and passage even better than the factory specifications) said with the fr Anyway! something has to happen, so chip tuning on the net I hit WWW.fasttuning.eu. This company offers a chip tuning for my 2.0 gasoline engine, 158hp + 25nm more power. Has anyone done this yet? and how are your experiences with chip tuning in general? Would I be very happy about information!