I write this coming to Logos 5 (Bronze plus Crossgrade) from Logos 4 LE.
First things first, I still think Logos needs to be clearer in their pricing structure. To me at least, instead of having versions with escalating functionality the Minimal Crossgrade should have been folded into and priced into all upgrades.
That said, on to Logos 5.
I found the installation easy (I am running Windows 8). It also was rather faster than the Logos 4 install. All resources downloaded properly (including my extra books and the Minimal Crossgrade components).
My next surprise was in opening the program - someone made Logos eat its Wheaties! The new UI is very similar to the old but everything is visibly faster. Books open quickly now instead of like sludge in 4. As to new functionality, so far I have not needed to use it all yet but the Search is way better - it is no longer as crazily literal as it was in L4. Prior to 5 I was reduced to using Bing and Google to do searches then access Logos based on the results. So far in 5 I can FINALLY work completely with Logos.
So a good start to date.