Very handy & translates not only whole web pages but also just the parts of the page that are in a foreign language (ex: a foreign language comment in a string of English comments).

Just two things I don't care for and, though seemingly small, are annoying enough for me to disable it for now.

1) It may seem obvious to others, but I find the toolbar button's 'options' when clicked to begin translating confusing. I just want to click the button, approve of what options it's showing me, and click 'Translate Now', or some such button.
Instead, I'm like: "....now what? No actual button to click".

2) When highlighting a word or sentence in any web page (to copy / cut, etcetera) the little blue "G" translate popup button hovers over the highlighted word. This is annoying for two reasons:
a) It gets in the way of reading what's directly behind it (I know---it's small, but this seems a constant irritant). I *already* have the button in the address / tool bar to click if I want to engage this extension.
b) That little blue "G" button DOESN'T GO AWAY after the highlighted word / sentence is long 'un-highlighted'. You have to click a couple of times elsewhere in the web page to make it finally disappear.