I do think they needed to have done some more testing before releasing the paid model the way they did.
I don't mind the idea of paying for the program- if I stop having the issues I'm having on the free, I'll probably be purchasing a year's subscription. But right now? Right now the issues on the free subscription mean I don't trust putting money into the site. It's been what... two weeks? And people are still unable to practice once they've hit their limit of new words- despite being told they could always practice as much as they want. It's been that long and people are still being told they've graduated after having learned.. 300 words because the system doesn't know what to do.
I'm trying to stay hopeful that they'll fix the big issues before I hit the 3000 free words- because if not? I'll probably tell myself I'll keep checking back for when they do fix it and end up giving up on the site soon after.