To anyone wondering if they should pay for the upgrade from the 4.x train to 5.x, it is absolutely worth it.
For me, encoding a 45 minute 720p avi has dropped from 2.5 hours (4.56) to around 45 minutes (5.03) [windows 10, i7-2600]. Same settings, same filters.
CPU utilization went from 25% to 99%.
Thank you!