I have one just like that. I bought it in the early 70s for my Kenmore machine. I have used it for just about every machine I have ever owned...which are many. It's fine at low speed, but when i sew fast the machine kind of bounces around. I'm pretty sure I paid $69 for it. I am not using it any more.
A much sturdier table is the Gidget sold at Joann and many Internet sewing machine sites. I paid $124 delivered and it is very sturdy. The machine can be recessed into the table, or the platform can be raised if one wants to sew with the free arm.