I will give you my first hand experience, no gimmicks, marketing or made up information.
This should help majority of you out there, I think.
I wasn't aware of the 12 noon check in and 12 noon check out rule.
When I landed in Bengaluru at 2 am, obviously I made it to the hotel around 4 am with all the airport check out and commute (25 mins) from Airport to Chairman's resort in Sahakar Nagar.
Since I had the reservation for the day I arrived at 4 am, I wasn't able to check in until 12 noon without paying one more day's room cost. So basically from 4 am to 12 noon and from 12 noon to next day 12 noon - (2 days charge total)
Keeping in mind that booking through Expedia, the Hotel has limited options to give you since bookings through Expedia are more cheaper than a walk in booking (if rooms available).
Studio room rates: Walk in or call in booking direct with the resort : Rs 2500 + 24% tax and Expedia booking was Rs 1950 (including all taxes)
Since I was there at 4 am, I agreed to pay one day charge up to 12 noon same day and I actually needed to check out by 6 pm as per my schedule so the staff was kind enough to charge my only for half of the post 12 noon rental.
Since I booked through Expedia, they charged me 1950 for 4 am to 12 noon and 1000 (1950/2) for 12 noon to 6 pm.
The complimentary breakfast was very good since it was outdoor across the front lawn and good menu as well.
Summary: It was a pleasant and carefree stay, staff was really co-operative and helpful.