The thing is, if you had v3 and upgrade, your likely to waste many hours.
On the face of it, its very cheap software for what you get. However, if you waste at least a day (and the forums back this up) upgrading, is it really such a cheap / viable solution???
This has been the worst upgrade experience I have EVER had (as is the case for many others).
And the claimed speed improvement after finally upgrading? Not a chance! The last build of v3 was fine, v4 is awful.
Its very sad, I would love for them to succeed in competing in the vitalization market, but this is not the answer unfortunately.