I've been using Logos for quite a while - started with John MacArthur's study library in Logos 3 way back when...
Been using Logos 4 since it was released and have been becoming more and more disappointed as time has gone on. Currently using Logos on a laptop (main machine) with a Core2 Duo running at 2.00 GHz with 4Gb of RAM and a NVIDIA GeForce 9600GS M. And frankly Logos 4 is almost unusable to me. Scrolling is appalling as the page freezes and I get a "Not Responding" message every few lines or so. Scrolling one chapter in Job (studying suffering...) takes over a minute. This is ridiculous. Any click generates a pause of upto about 10 seconds.
If it wasn't for the fact I have invested so much in Logos over the years I would ditch this joke of a piece of software in a moment. Real books are looking more and more appealing.
Yes, this will probably come off as a rant. I do really want to love Logos again so if anyone has any ideas other than "buy a new machine" then I'm listening.