Ya reason 4 is great... thor.. is ... amazing. such a badass synth box its retarded. Everything else is great, arp machine works pretty cool.. I have one problem though, the new track editor like draw in thing they added, where u draw in the section your going to edit.. that gets really inconvinient and really old... really fast. Besides that, I love it, i quit usin FL completly for reason. So ya, if your well equiped for reason 3, you'll be fine with 4. Its more like a neat update then a completly new software.