Pros: you can study at your pace, whenever you want.
Cons: Learning how to write text is sort of missing because for longer sentences you don't correct, you just give a suggestion. Therefore, you think you might be doing quite alright but who knows?
Reply Thelanguageacademy.nl:
Thank you for your feedback and congratulations on completing your certificate for Dutch Intermediate 1! We agree with you that e-learning can be difficult when practicing your writing, as you don’t receive personalized feedback. If you prefer a course with feedback by a teacher, we can recommend our Online+Teacher packages: e-learning + conversation classes by a teacher. Those classes are focused on conversation, but the teacher will be able to help you should you have grammatical questions. Succes met het verder verbeteren van je Nederlands!