Upgrade PhotoPlus X4 to X5?
 

I've had an e-mail from Serif offering an upgrade to X5 for £30 to include the guide and Panorama Plus and some other extras. All in all it looks a good offer but as someone once said "A bargain ain't a bargain unless you really want it".
So would anyone like to comment on whether this upgrade is really worth spending good cash on? Has anyone found that much more in X5 compared with X4?
Dagwood