At last my new sewing table has arrived! I asked for suggestions and got them, so thank you all. The best deal was the SewEzi and it was just what I expected. My machine fits in it perfectly and the surface is super smooth and white with purple to match the purple on my machine.Assembly was easy too. I am expert at anything using an Allen wrench! The height is exactly where I want it to be, lined up with my larger table, thanks to the furniture moving pads I placed under the feet.
As for sewing on it...I can make it jiggle if I am going a hundred mph but I know this is not going to be my quilting machine, just my piecing machine which means slower sewing, usually. The insert is specifically cut for my Janome 6500P, and they offer inserts for all brands.
It has little wheels, which imho are superfluous, as picking it up to move it is easier than picking up my dog. Only 23 pounds, sans machine, which you wouldn't be dragging as a unit.