I've tried this collider preset and it is AMAZING for vaginal and anal penetration using male / futa characters with VERY large (and long) dicks. Combined with some of the Belly Bulger plugins out there it can be tweaked to 'really' make some crazy sizes 'Go all the way through' indeed.
Now, with this said, I must say - however - that I cannot say the same about Blowjobs and/or Deepthroats (with very large dicks). Obviously, the Penis Tip of a 'very large' dick should - at least - not actually be physically bigger than the actual Face of the character that's supposed to perform the blowjob. However, I mention this because I _have_ seen another simulation type "game" (using Unity, too) where very large dicks were actually able to physically 'deform' most of the female's mouth in order to avoid the penis to 'clip through' (up to a certain point, of course). However, in VAM, it seems like everything really repends on the Colliders, rather than having any system in place to do any sort of dynamic mesh / vertices deformation.
So, I did manually try to re-adjust the Face / Mouth / Neck / Jaw colliders (while a large dick was actually 'trying' to get inside and spazzing left and right, dramatically trying its best to come out of there) but to relatively no avail. I'm noticing that 'clipping through' the sides of the mouth (or the mouth lips) - even if the female only tries to blow the tip, but a _large_ tip obviously - is almost impossible to avoid; unless we just downgrade the size of everything on the Penis side of things (width, height, overall size, and length).
Another 'issue' I've noticed using this preset is that if it is used in a Scene where the female moves or does other kind of animations (before or after the blowjob, say in a more complex scene where she'd move around the vicinity to go near a table for another sex position, etc) then during such movements the sides of the mouth look like cloth with physics, and it's... well, it's ugly, to be frank. The lip sides move like it's jello, without any 'resistance'. It's sort of "ok" if the Scene ONLY had a Blowjob involved, and if of course all the sizes correspond to the current preset's colliders. But outside of a Blowjob scene, other types of character movement makes those mouth lips sides move horribly (even if the Scene if a Doggystyle penetration Scene and every thrusts from behind makes her lips move back and forth in response, almost like cloth simulation would).
So, of course, User-specific adjustments are required pretty much on a Per-Character basis. That's alright when it comes to trying out different dick sizes for specific characters to interact with. BUT, those lips moving without resistance on the sides of the mouth is something I haven't been able to figure out how to fix so far (probably not outside of just resetting the whole Jaw / Mouth colliders changes back to Default; that would surely 'fix' it but it would contradict the very idea behind this plugin).
I do wonder though, if perhaps another 'issue' regarding Blowjobs and Deepthroats might not actually be related to the Male / Futa's own Penis colliders, instead of the female's Head / Jaw / Mouth ones. By that I mean, well... it's just a Penis, so of course it's not like the Colliders should be very complex for a dick. BUT, I do feel that having JUST a "Tip", "Lower Tip", "Mid" and "Base" cylindrical collider system is not enough. I feel like there should be perhaps one or two extra colliders (especially for very long and large dicks) in order to accommodate the new size, because for now, with just 2 "main" cylinders it can even provoke unnatural bending on just 2 spots on a large and long penis and it looks ugly when it does happen. I'm sure that if there was 2 more colliders it would help create a MUCH better 'curve' to facilitate a big one going down a throat (jeebus does it make this convo sound too perverted).
So maybe there exists another Plugin maybe to _add_ colliders? If so, I wouldn't be aware of it (but I haven't fully checked on that yet as I'm typing this I'm just thinking about something like that). Either adding new colliders to the Penis OR maybe a way to change the current Penis colliders SHAPES, instead (then again, changing shapes might still require _additional_ new colliders because 'extra' empty space might be created if shapes would be changed, and those empty spots would require colliders or clipping issues would be inevitable).
But with all this said, do understand that I LOVE this preset nonetheless; because when it comes to 'fully through' Penetration it works like a charm in the vast majority of cases. If any adjustments for Penetration is required then it's usually enough to just add Auto Bulger plugins or manually just use Female Morphs to open the vagina a bit more and that's it, you're set.