I think it is worth to get V4.  I purchased it before the new year with the promotional price.   I would like to suggest that you get the complete version, not just the base.  I'm impressed with the morph dials, they looks complicated but after spending time with it.  I can create something that does not look like Victoria from head to toes.  I'm using DAZ|Studio.  I've heard that it doesn't perform very well in Poser.  I've no clue because I'm not a Poser's user.  To see how well it can morph, take a look at my morph.  Without any customized morph, just by using the dials.  That's the result:

You can see the comparison by taking a look at my avatar, which is the morph I created by using Blender for using with Aiko 3 LE.

I monitored the number of downloads of my morph, it is not as popular as my Aiko 3 or Victoria 3 counterpart.  I still work on Aiko 3 because it consumes less computing power.  Many of the users of my freebies still prefer Aiko 3 or Victoria 3.  As a freebie creator, I prepared for the changes.