Version 4 is so much better both by look and the ever increasing features its coming with.
It also allows a lot of central configuration, most user preferences have been removed but this is probably a good thing as they generally never got used.
There are a few things missing currently that have not been migrated over from older versions yet but overall it looks very modern and its slick.
I would recommend it for sure. Be careful to check what you get when you upgrade from older version to 4, it differs depending if you originally had a paid for version or the out of the box system pack.