I am currently working on level 12 of 50, but I have been picking at it pretty slowly due to school. From what I have seen up to this point I like it. It forces you to type the answers which I think is better for learning and it has recently added context sentences for the vocabulary but it still has a primary emphasis on kanji. It has helped me a lot but i still recommend fogging natural sentences to get a true grasp of the Vian. The account is free for the first couple of levels but they also feel really slow, it is kind of a snowball effect. Use the account to ask the people on the forums they tend to be pretty active and pretty honest.
I hope this helps at least a little bit.