[SceptileMaster]

I like genki. I personally vouch for it. I don't like みんなの日本語 because of the way verb conjugation was taught. Teaching you verbs from their ます kind of form first then teaching you to conjugate them from that doesn't make much sense but I suppose the important thing is being able to speak it at the end of the road no matter how you got there. However, I have never used so Yookoso so I can't say anything about it.