As a former British colony and former less-successful big-brother to Singapore, Malaysia pitches KL as an Islamic version of Singapore, but the result is a series of depreciating "national prestige" projects like the Petronas Towers (below) and "Cyberjaya," a new town carved out of the jungle and farmland to be Malaysia's magnet for IT companies. (and it ain't working - Cyberjaya is half-built and barely occupied.)
(another example of an Ill-concieved prestige project: Malaysia has paid big to host a tennis match between retired Pete Sampras and world#1 and unbeatable machine, Roger Federer, also 10 years junior to Sampras. Malaysia aims to attract world-class sporting events, but 1 hrs of Federer acing Sampras will only prove Malaysia is "dumb money.")
While once impressive, each of the national prestige buildings has been surpassed by efforts elsewhere, like China. So, if you're looking to see the 4th tallest radio tower, come to KL. Otherwise, spend an
extra day in China or elsewhere.