Inaccurate information and jacked up prices
The trip from Sg to KL was alright, although the bus reached KL a whole hour after the scheduled time of arrival. That was First Coach. However, the return trip was a nightmare. The itinerary they sent me indicated pick-up at Berjaya Times Square for my ride with Super Nice Express but the check-in counter was actually on the opposite side of the road, which I found out a little too late so I missed the bus. Just a bit of context: that road separating the two sides is pretty wide and the opposite side is almost always blocked from view by tall coaches. I was waiting on the wrong side thinking the bus will eventually come then issue the ticket before departure. 15 mins after the scheduled departure time, I tried calling the number on the itinerary only to be told that the bus is "on the way" even though I told the guy I was waiting to board the bus. So I waited for another 30 mins, which is when I saw the very subtle sign on the opposite side that said "Super Nice Express". I had to get a new ride after that with another bus company that also distributes its tickets through redbus and guess what... The ticket sold at the counter is easily 20% less than what you'd pay for on redbus.