I am the opposite I like the old system better.
In the new system, Instead of just having to adjust, then adjust, then adjust the days in my request to find the actual length of days available in the system, determine the start date and end date, which is what you had to do in the new system.
In the old system you could just look at what was available in showed start and end date and lengths and if there were multiple units. It told you so much more than the new system.
My guess is people who know what they want like the new system. People who want to know specific information, how many, how long, etc, like the old system better.
It would be interesting to see what % of bookings were done on the old or on the new system.