I was disappointed to see a negative review while I was in the process of recommending this saw to a friend.
I use a single-speed version of this saw for professional prototyping, and in some ways I prefer it to my $500 Delta.
When I want it to be, it's portable at 35 pounds.
To minimize vibration, I clamp it to my workbench when in use.
Unlike a number of scroll saws in this price range, the table is cast iron and NOT aluminum. In the constant battle against vibration, a big chunk of cast iron is your friend.
I use the saw sideways, with the blade-tensioning knob to my right. The blade can be mounted for both from-the-front and from-the-side use.
The blade hole is too large for my purposes -- little things get caught in it -- so I remedied that situation by applying a 1/4"-thick piece of marker board (Home Depot) to the top with a small hole in the middle. That gives me a slick working surface and acts as a zero-clearance insert.
Bottom line: I highly recommend the saw except for extremely intricate fretwork.