I bought this machine to replace an old Ryobi spindle sander of the same design, that had finally given up the ghost after years of faithful service. The Grizzly G0538 is the only spindle sander of this design that I know of now. I hope Grizzly keeps this machine in the lineup for a long time, because it is so jig-able.
I jigged this sander up with an adjustable hinged fence, which enables me to thickness sand small parts, like binding strips, bridge blanks, and even headstocks for the guitars I build. It is ideal for this purpose, as well as the regular shaping operations you use a spindle sander for. In order for it to work well as a thickness sander, the spindle has to oscillate with ZERO wobble; and this one runs true. My parts come out the other end at perfectly uniform thickness.
I made the fence out of 3/4 MDF, and it attaches to the top of the sander with threaded inserts and knobs with 1/4-20 threads. This is an easy modification to make, since the top of the spindle sander is made of MDF, and drilling it for threaded inserts to attach your shop-made jigs is quick and easy. (If you do this, be sure to stabilize the drilled holes with plenty of CA Superglue before you screw in the threaded inserts.)
A couple other pluses with this machine are, it runs much quieter than my old Ryobi; and the dust collection port under the table works really well with a shop-vac or 3 dust collector hose attached.
I use this machine every day, for all sorts of shaping and thicknessing operations, so, yeah, Im definitely getting a lot of bang for the buck out of this one!