I own a VR3 from my OC trimix days. I like it a lot and I don't mind the extra deco. I dive it set to 0 and then pad the assent to reflect a VPM/GF (i.e. a stop for one min every 3m but in reality, it's just a slow assent between VR3 stops) I find this works for me, and after the 1st deep stop the VR3 credits me for slow assent.
I haven't really done enough deco to know how it will work out with my KISS - I don't have it integrated BTW.
I have just bought a Shearwater and HUD though

so the VR3 may be up for sale soon.
[EDIT: obviously I carry back up tables, but this thread is about computers]
Cheers
Rich