While I appreciate the lack of romanization, the program conveys absolutely no phonetic infomation. Since Thai is a tonal language with a complicated orthography and no spaces between words, I think the program would be pretty difficult for someone starting from scratch. Similarly, all the grammar is learned from inference- nothing is explicetly "taught". This is a different approach from what I'm used to- I'm interested to see how I do with it.
RS comes with a headset, which can supposedly be used to record your voice. It shows the waveform and pitch of both the speaker's example and your attempts. Supposedly. I haven't really gotten it to work well.
Verdict? Looks like a great study tool. ขอบคุณพ่อ