I just noticed today that we now have the ability to slow down the speed of the lessons not only to 50% but also 75% and 90%. You also added the ability to loop just certain portions of a lesson of our choosing!!!!
You should be shouting this from the mountain tops. You just made the best guitar lesson site on the internet 100X better.
Thank you, thank you, thank you. 
Exactly!! I was just now working on the first solo in Sweet Home Alabama and thinking how much better it would be with other less than 100% speed options. I went to the forums to see how others felt and I noticed similar frustrations: 0.5x too slow, 1x too fast. I do a refresh on my screen and BAM! - there are the other slow speed options in the menu...??!! Am I dreaming?? If so, don't wake me up until I get that solo nailed 
THANK YOU GT!!!
Yes, thank you very much. The best way to learn a song is to slow down. Now we can.
Thanks again.
