It is an improvement: 1. It lets you know that you clicked the go button correctly and that the computer isn't waiting for more input (perhaps you could disabl

It is an improvement: 1. It lets you know that you clicked the go button correctly and that the computer isn't waiting for more input (perhaps you could disable the inputs as well). 2. It gives a user a reasonable expectation of how long the process should take i.e. it's not instant and they have to wait a bit.