change text in subscribe by email plugin

The default text is: Subscribe by Email
Completely spam free, opt out any time.
Email address
I want to change it to - never miss one of our reviews. Subscribe below and we will send you an email when we post a new review. Just enter your email below.

1. how can I change the text?
2. how can I change the text of the subscribe button?
3. How can I change the color of the text and of the box and button?