Congratulations on the SM7. Too bad it had problems. I have both the SM3 and SM7. I've typed on several of both. Needless to say the SM3 is a much nicer typer.
That's my initial impression too. Yet, the SM7 does have some rather nice features. I wasn't wild about the SM9 I used to have, and wanted to see how an older model compared. We'll see whether it stays or goes.