by flight, KLIA airport shopping, told the goods are more expensive than suwanapoomi. take taxi by the taxi counter(70-100RM KLIA-Town area), reliable and safe. hotel (from 60RM-150RM/night). stay in hostel or hotel such promo on your credit card promotion, air asia co. hotel, you may join CS www.couchsurfing.org where people help people in traveling. collect MRT-LRT city train map at the station(same like bkk). there also shuttle bus from station. taxi (35RM)is not so reliable in KL(don't talk to them, expecially malay and indian). so always be cautious about that. learn some malay language, cantonese language. don't miss mamak store at night. malay food and chinese food , everywhere, uptown, subang, bangsar, taman tun rasak, ss2, pj etc. at night , just be more struck with your plan cause transport at night really not suck. don miss pub and bar, disco anywhere, food and 5* spots! shopping, pavilion, time sqr, KLCC, lot 10, sungai wang or plaza malam(find out!).
not dangerous but not so safe! anyway have fun