On my mbp i always use MS Word + Grammarly. I use MS Word a bit on my Air, but once I get a Pro I won't have any access for editing, so I'm gonna have to say goodbye to that app. Ulysses and Pages doesn't have grammar correction, therefor I won't use it! I'm a terrible speller and Ms Word has been the only one helping me with that. If only Grammarly became mobile, I'd happily be using it!