Can't go wrong with the Jessum if you get a new one, the older models aren't near as good.
Things to look at are
1: what does it take to adjust the height?
2: How do you change the bit?
3. Will your router fit their holder?
5. Is it easy to add a vac?
I"m sure the members here can add more, but these are what I look for. And with me "It's can I justfy the cost to the little lady!"
Cut it twice, and it's still too short!