Update
The heating up of the the US economy has caught with apartment renters. In most major cities rents have increased, vacancies have decreased and it is simply hard to find what you want.
First, over the last few years apartments have adopted the pricing software. The more a unit is view, the more it will cost. When renters visit communities, they need to be ready to rent. Information in hand and money for the deposit.
Second, fewer apartments are holding units off the market. Just a few years ago, a community might give you a week to decide. Today, 24 hours is more likely.
In summary, be ready to make a decision when you visit a community.