I know this is a couple weeks late but welcome aboard, there are several helpful people here on the forums and unlike Startly any mention of other software isn't removed.
https://www.google.com/search?q=site:forums.startly.com%20"Keyboard%20Maestro"
https://www.google.com/search?q=site:forum.keyboardmaestro.com%20QuicKeys
I started switching over 2 years ago and it was extremely painful because I had over 1,000 macros I used in QuicKeys. The screen aware features initially pulled me over since QuicKeys didn't have that and all the little things that broke finally helped me to just go all in.
There is a steeper learning curve no doubt and I still have a lot of hurdles to overcome but @peternlewis @ccstone @JMichaelTX @DanThomas and @Tom Have ben amazing among others at helping with the switch.
You'll find that updating an entire group of commands for a new update of software to be much simpler then it is in QuicKeys. If you choose to have two different names or the software has different names with updates like Microsoft Excel 2011, Microsoft Excel 2016 etc. adding all the different versions is done in one location rather then in every command.
Dealing with multiple macros assigned to the same key command is so much easier (called the conflict pallet in Keyboard Maestro) and doesn't deal with you dragging them to a pallet. What might not be as obveous as in QuicKeys (at least it wasn't for me) is sorting them. This thread was very helpful to me and something I use all the time. Duplicate Key Command for Macro Palette
I have found that Keyboard Maestro seems to shave a few msec off in some cases seconds compared to what was done in QuicKeys.
I have only a few more things I need to move over and the biggest things holding me back that I still use QuicKeys for is that Keyboard Maestro doesn't recognize hidden background applications with windows in the front. This is the case for most menulet applications that don't show up when you command+tab through apps (or show up in the doc with a dot under them) but have a window at the front. Once Keyboard Maestro adds this feature I think I will have ditched QuicKeys for good.
Best wishes with the transition!