I have the Gidget and I put my old heavy mechanical machine in it. I don't notice any vibration. I also put my big Janome 8200 on it last winter because I didn't have a table available, and sewed on it for 3 months. The Janome wouldn't fit in the inset so I just put the inset up level with the table and put my machine on top of it. Like Onebyone, I did get a little vibration if I sewed super fast, so I didn't sew super fast. I really like it. It's pretty heavy so I wouldn't take it with me to sew unless I know I won't have a table to sew on. It folds up and stores flat which I appreciate because I have to put it in a closet when I'm not using it.