Well, I'm using old (v3) version of VW, and I can say that support you get from developer is great.
In case of a bug, you'll pretty soon receive code you need to change, so you don't need to upload new version.
This version (v4) probably would need some more time to reach full stability, but has some great options. So, you can buy old one and start using it, till new version reaches desired stability.
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