I am not sure that I can add much to what has been said, but since I too have the complete Incra LS system. Also I have the Mast R Lift included in the set up. The Wonder fence, as you may well understand, is attached to the fence that is associated with the TS application. It can be set with the off set feature and opened wide to be used with large diameter bits. The dovetail jig works as advertised with one small exception. This is not really an exception but a point not covered very well with the instructional DVD that comes with the jig. I have talked about this on this forum and have received an array of different opinions on the point that I am referring. The issue is the importance and perhaps safe to say rather difficult to get the set up perfectly centered. This is a just a matter of understanding the issue and what to do if you make your dovetail or box joints cut without being perfectly centered. Like so many things, it's a simple issue once you get the gist of what is going on. But, for now, all that I want to say to you is that in my opionion if you go all the way and get the full blown system, you will not be disappointed with it. I am extremely happy with mine. Also, after you get it and start to use it, the help that you can get is virtailly unlimited thanks to this forum and Mark Mueller who is the tech for for Incra, don't be afraid to contact him by either phone, or e-mail. If you have more specific questions, just ask, you will get plenty of help, guess I said that.
Good Luck with your decision,