Spoiler Alert - I used to work for Robert Sorby (and still help out at shows and events) but the info here is very neutral...They have changed how they sell the system last year...as the Pro Edge can be used for so many different tasks so instead of trying to sell you a "one bundle fits all" solution you now buy in effect a "naked" Pro Edge (the basic machine itself) and then add (if you wish) one of three jigs / accessory kits...one aimed squarely at woodturners (the one most of us on here would probably use) a Woodworker kit- aimed at amongst other things plane and chisel blades rather than woodturning tools and a slightly more specialist Knife maker kit.
Just ensure when shopping if any price you see is machine only, or the machine and the appropriate"kit" to fit your needs.
I'm thoroughly biased - (I don't own one personally yet, (although this is due to change soon)) but compared to any other system I have used, which includes Tormek, dry grinders and other sharpening systems, I think this is the bees knees...yup, not cheap (but the best quality stuff never is..) and think...it's an investment in every single tool you've bought to date and in anything you buy in the future!
Tony Kwasniak