Today was the first time we used the MRT, Hong Kong's underground system.
It's a comprehensive network covering not just all of the city areas but also further afield, up to the New Territories and across the river to HK Island (Central) and it seems to be good value for money.
A single trip will set you back HK$ 5 (< 50p) and as in most countries, you get your ticket directly from a machine that at first looks well complicated but isn't if you take a second to simply read the instructions. Every where is spotless as you'd expect, the trains arrive bang on time at frequent intervals and there's no danger of falling onto the tracks as you're behind glass barriers. It is a rather sophisticated way of travelling and we didn't experience any kind of overcrowding.
Unlike some places we've visited.