It's pretty good with a few drawbacks
1) I really wish it included the noun genders. This one is a little puzzling as it requires the "å" for every verb.
2) Unless I'm missing a setting somewhere, only being able to review 6 words at a time is really annoying. 10,20, or endless would result in so much less wasted clicking.
3) No indication of the language - when it's asking about "time" - is that English and it wants Norwegian "tid", or Norwegian and wants the English "hour"?
And not a missing feature, but it took me way too long to find the "practice" feature (review all word lists at once) under the "rocket ship" tab. It's good as is, but missing a couple important things.