They are versatile machines. Mine is old enough to have a "Rockwell" label on it, but they are all the same.
I run mostly 1/2" 3 wing steel cutters on mine, but have interchangeable bearing cartridges as well as spindles. I use a 3/4" spindle with some tooling. With 200 3 wing cutters, split collar knives, and a bunch of brazed tooling, we can make about anything. A good 3 wheel feeder even allows power fed parts. The spindles and housings are stable and smooth operating. That is why these are still around - a good design.
We made our own fence carrier with interchangeable faces so we can easily support a cut as needed.
If they have a fault, they are underpowered. I don't know how much you can put on the machine. The antique 1-1/2HP motor on mine barely fits in there cabinet. We don't raise panels with it.
With a special stub spindle, we use a recessed bolt to hold the cutter, and then a tenon can pass over the top of the spindle. The cutter makes the cope and can even final size the tenon. This can enable lots of sticking profiles if you have customers wanting that, without spending thousands of dollars on tooling for each.