I have the Kel McNaughton with the medium series blades. I have used it a couple of times, mostly on green wood. It only requires the correct size toolpost holder, which in my case is a 1".
It does take a little practice. I went through the bottom on my first attempts, mostly because I got the setup wrong. However, I believe the Kel McNaughton is probably the most flexible on the market (although Mark Hancock will possibly dispute that), and once you get the setup right, it does work very well. There's an instructional DVD available where Mike Mahoney shows how to use it (in flippers, will you believe it!), that does help some.
Tricky to use them on lathes with less than 1HP, but that won't be a problem with a VB36.
Haven't used any of the others, so cannot really give a comparison.