I agreed that you should join HOHO to see Delhi in one day.
They bring you to many tourist places you need to see when visited , like Lotus Temple, India Gate, Homayun Tomb, Red Fort, etc
For me, I stopped at the places I m interested only, and the tour guides in the bus were very friendly , especially Tripty very helpful.
It costs 800 rupees for a foreigner to join HOHO but it’s reasonable price to see Delhi.
Tourists who don’t join tour should join this HOHO to see Delhi.