Does not recommend this product
Great idea, but too bad that in practice it does not work for real-life complex web applications.
It randomly changes the lang attribute to French, randomly breaks your forms, instead of submitting them, it pops up their interface, etc...
And their support is terrible, well, just doesn't exist. Why tell your customers that you are looking into the issues if you are not? only after the fourth email and two weeks later they finally reply truthfully telling you they don't know what's going on and it might or might not be fixed in the next release (and it will be a surprise when that is).