Honestly, my girlfriend and I subscribe to Zone-Archive, not only for the quality, but the seer talent and effort that go into these. Free stuff is generally either incomplete or cheap-looking. This is good, high quality work, and should be treated as such. Zone, I'll never criticize you for charging on Archive. You earn that cash.
As far as a review, I do wish there was a little more interactivity, but what is there is solid as hell. More options would be an improvement, of course. But all in due time. Your work is always improving, and I expect anything more I could want will come in time.
Incidentally, where do you get the music you use? This, Umiko, the others, all awesome tracks. Where can we get them? And if you produce them, could you make them available, somehow?
Thanks again for quality work. Keep it up.