Among all the options I texlty provides I'm using the grammar check on my browser, the fact I can use it there and more I do it the more it recognizes my writing patterns, the more I like using it. I really love the layout and I think is just an amazing tool.
Another thing that is free, come on, who does not like free stuff that are actually useful and good?
So far I haven't found a thing I don't like about it! I think I should get to use it more to have more hints of the product itself or even using the EDU or Business versions in some point, is just a matter of the needs of each client.
If you want to get a free good grammar checker this is the right one
Misspeling words is the most common. It helps a lot on that, also the fact I have it as plug in on my browser gives me the access to said checker easily.
Is just a matter of underlining what I need and that is it.