Google's pushes in Gmail's new compose experience

Google introduced their new e-mail compose window as an option last October, but Gmail users have noticed this morning that this is now the default way it will be from now on.

The new compose experience is a pop-up window that appears on the right side of the screen, and makes it easier to not only send e-mails, but to multitask within Gmail. Google have noted that it is a little harder finding text formatting options such as underline, indent, numbered and unnumbered lists, but they're still floating around.

I have noticed it as an option for me, but it is not forced on me just yet. How do you find the new compose experience?