Greg nailed it, as did Robert .... I also saw on the last page on the Alesis site that it has "optional asio4all drivers" ....
NO.... do not purchase this interface.
I am partial to the Focusrite product line because I have one and know how well it works.
If you are using softsynths, that means you are working with MIDI. If your synth/keyboard has USB output you do not need to have a midi input on the interface, however, if the synth/keyboard is old school and has the 5 pin midi output you will be better served to find an interface which also supports midi in/out with the 5 pin connector.
Look around and find something with the inputs and outputs you need and running native ASIO drivers. You will appreciate it. Consider the interface to be the heart of the studio. It should not be short changed.