Virtual assistants that look after your travel. Using your criteria:
(1) value delivered to me - dedicated travel assistants experts on the destination via chat & team hub (in case you need) to manage approvals workflow, billing, invoices, policies and a few more stuff
(2) cost, because I can't spend more than I make - for now it's free.
(3) time saved out of my day/week/month - well that depends on how often do you have to deal with business trips