I have been a Logos user for many, many years and use it all the time.
My biggest issue with Logos at this time is performance (or lack thereof). I have a pretty high end machine (quad core, 7200 RPM HDDs, 4 GB memory, etc), but Logos is the worst performing application on my machine (by far). For example, it takes 10 to 20 seconds just to startup Logos and get to the home page. Opening a saved layout takes another 5-10 seconds. It seems that almost everything is in slow motion.
And when I use Logos on my laptop it is even worse.
Does anyone know what the status of improving performance is at this point?