I was concerned about the supposed hump that even Rousseau references but it's so subtle I'm not seeing it.  I was looking for an economical way to get a router table for my new Bosch 1617 and using this to build one on the end of my Ridgid R4512 table saw was very successful.  Yeah, it takes a bit of effort to pop out the rings but it's not any kind of deal breaker and probably not even a bad thing.  Maybe someday if I become a real woodworker I might graduate to something fancier but this will certainly get me started and leave a few bucks for router bits.