I bought the Delta 28-206 enclosed base band saw just today, and I got the mobile base with it so I could set it all up together.  It's great being able to move it around, since I have limited space and lots of power tools.  The only complaint is I find it a little wobbly, but it probably won't be a problem.  And the 94 bucks it cost seems a little high, but I'll someday forget how much it cost, right?  I'm definitely glad I bought it.  It lifts the machine and sets it back down very easily, but won't roll over a deep expansion groove in my concrete floor very well.  But I still like it.  Oh, and the saw's great, too!