wont lah....there are so many tour agencies, including plenty of imitation sinhcafe agencies in district 1 area.....
( genuine agency's offical name is changed to sinhtourist, but sinhcafe name still widely used )......
can ask hotel to book for you, to save yourself the trouble....coz if any probs, they can help you.....when i was in hanoi, van from agency to pick us up was late 15, 30 mins...made me so panicky tht time, had to call to ensure.....
or book ownself with any agency.....but if you first timer, want to feel more secure n want to book ownself......, stick to sinhtourist.....the website is below.......their sinhcafe website still works, but forgot the link....many imitation links also......search for address in hcmc.....
dun bother asking hotel where is sinhtourist, coz they will ask you to book with them instead...which is natural lah...hahaha
http://www.thesinhtourist.vn/