Hmm, i chose WTS is solely for convenience nia haha, so far i only encounter being ask to change bus in 2nd link checkpoint in Malaysia, the initial bus we board only ferry us to check point nia with WTS. But hor, after using those 7seater Private transport, i think i wont go back to coach liao. Albeit slightly ex, but very convenient and not rushing. Suitable for older people bah.
If you book early, you wont have this problem. Try booking 1 mth ahead of travel dates.
When the bus capacity not full, they need to add up stragglers from all over SG pickup points.
They used part time drivers from JB branch to pick them in SG n gather in msia checkpoints.
They probably allowed 1-2 vacancy.
I had encountered few times if i booked under 1-2 weeks of the travel dates during non-peaks.
Transtar also same issues.
Transtar had a occasional benefits of free upgrades from ClubZ to Solitaire, only downside of change bus uphill..
i had no complains as Solitaire more spacy.