If you need a simple contact form, this is the best choice you can work with.
I've applied this component on several sites and have worked very well. My favorite option is the choice to deliver what kind of subject you can set so it can be as flexible as possible to deliver certain kind of messages.
The small con y see on this extension is the limitation it has of adding 2 extra fields and not customize them for each language is implemented, thing than i have cheatd with a small trick on template override.
The componet is really easy o use but if you need to build something with more than 2 extra fields on the form you became limited on the form.