Firstly, taking a bus is quite comfy. In fact, there are many VIP buses 27 seaters with comfortable seats and big seating space between the front rows and your seats. You can dispose your eats to almost 70deg. Bus tickets are also inexpensive as compare to plane tickets. There is no tax for airport and you do not need to pay any of these charge. In fact, the bus charge from Singapore to Kuala Lumpur is only $30.
Total time is also comparable as you do not need to ensure in 2hours earlier preceding departure. In addition, the travelling time from airport to your house is usually much more than the local bus stations to your house. For your convenience, you can also use your mobile phone in the bus, but remember not in the plane. You can always talk with your love ones while you are travelling by bus backside.
There are numerous buses travelling back to Kuala Lumpur, it has been almost an hour a bus traveling back from Singapore. In recent times, there are many bus companies that are presenting entertainment in bus that means you can always watch movie while travelling from bus to Kuala Lumpur. And also, they serve food in the bus. Their services are almost similar to 1st class seats in flight.
Also, if you want to have a view of Malacca then you may get bus from Singapore to Malacca. Well, Malacca is the historical city that is based in Malaysia on the west coast in front of the Straits of Malacca. It only takes 147 kilometers from Kuala Lumpur between the states of Negeri Sembilan and Johor. There are standard buses and luxury coaches from Singapore to Malacca that is 5½ hours journey and most of the people like to take bus from Singapore to Malacca as it is more convenient as the bus will stop at the centre of the town.
Thus, if you have to book in advance then you may search online booking websites and book your bus tickets as the coaches of these websites cover route between Singapore and Malaysia.