Yes...the default settings are dark but I now have two configurations (which you can save and load to suit)...one for bright, well lit slides, and one for dull, overcast slides.
Both configurations use all defaults except the tone curve which I adjusted to work for each set of lighting conditions.
I can email those files if you like but it really is quite simple to setup...after which it works really well.
When I first used it I was horrified to see how dark the scans were...but eventually I found a setting that worked...after which I became more and more impressed.
Now when I shoot slides I am confident they will scan ok...and if they don't it will be because the slide is no good and not the scanner.
With the Jenoptik it was the scanner letting me down more often than not.
Trust me...the Acer is a great scanner!!