Its helpful but I think there could be a better design. I think I will make my own.
I've tried it for pocket knife and "bec de corbeau" knife, it works great, better support. I've used it as well on standard chef and utility knives, works very well. dont think i'll be switching back and forth with the basic guide, not that it's difficult to install but why do it?
If you have any modern style folders with funky shaped spines, the slide guide makes things so much easier. It basically helps lock in the knife position making it pretty much a no brainer when flipping the blade over to sharpen the other side. I sharpened 2 Spyderco Paramilitaries on the Edge Pro since I got the system. One before the slide guide and one after getting the slide guide. Totally worth it.