A very useful service for English-learners and native English teachers who would like their students to improve their grammar skills and boost their vocabulary. Reasonable subscription.
Tip for consumers: The service is perfect for Russian speaking students.
They have delivered 2 packages to someone else and refused to admit it. Now I will have to ask any merchans if they send their goods with fedex and if they do, I will shop somewhere else. I am going to boycott the company until they improve their service.