To Be OR Not to - Buy Polo diesel? Octo 2011

Look and Style : Hi I need feed back from All Polo diesel owners whould I invest my hard earn money to buy POLO diesel ??? I read lot of negative reviews about POLO still want to confirm before taking decision. 1) What is servicing cost for diesel varient per year? Lot of ppl say its too costly can anyone tell me what exact amount ? (I have planns to have car atleast for 5 years.) 2) After sales service - how it is? Are spare parts too costly ? 3) Milllage --in city as well as on high way --- Please give answers of above questions ASAP.