One negative point about Woodlands Regional interchange is that
it has no toilet for the public. Has to use the one at Woodlands
MRT station. 
Other interchanges with no toilets for the public are Bishan (not
sure), Bt Merah, Bt Panjang, Clementi, Sengkang (toilet at Compass
Point), Toa Payoh (toilet at HDB Hub and shops area).