Sorry, I saw this too late to help you with your decision.
I have it. I hated using it on carpet but now have it set up in a different room without carpet and it seems much better. I did put a folded up towel under the machine (to raise my machine to the proper level) when I lowered it into the cutout. It does vibrate a bit when I have my Janome on high speed but I seldom sew that fast anyway.
I have a plexi table that I am going to try to set on the top with some nonslip shelf material under it so that I don't have to get an insert.
lots2do