Many travelers prefer a single king size bed in their hotel room when traveling. However I believe that getting two beds has cut my chance of having a bad mattress in half. While that phrase is a little misleading I have learned a few things that cut down my chances of getting a bad mattress.
The first one that is quite apparent is that if bed #1 does not meet your standards, you can change to bed #2. This could be something as simple as the airflow in the room. Typically it is something more serious, a mattress that is not consistent as it has a phone butt spot.
A phone butt spot is the location where the typical guest will sit while using the phone. If there is a night table between the two beds, the phone is typically closer to one bed. That bed is often sit on while the person is on the phone. Yes, I realize that many people will avoid using the phone all together, but arranging a wake-up call still occurs quite a bit. That is typically where the guest will sit while making that call or arranging for pizza delivery.
In addition having two beds gives you the benefit of having extra pillows for building a fort. One also can have dinner watching TV on one bed and have the other one be clean for sleeping. The list can continue but I think you get the idea.