Have you ever learned another language using an online course, and who was the course by?

I am trying to learn Chinese Mandarin, and pinyin romanized writing. I have gone as far as I can go alone, I have done all the youtube videos, and have learned a couple more words from reading pinyin.

I have never used a online course to learn a language, I recently tried one but hate it. All the course consisted of was matching words to pictures over and over, and I generally did not like its style (by roseta stone).

Have you ever learned another language via a course or online course? who was it by? how did you rate it?

What company makes good language courses?