I ordered one of these as well. 52" deck with the 21.5 Kawasaki. Really looking forward to it! I do have some incredibly thick and fast growing grass on my property, so I'm hopeful this unit has the power to handle it.
I will give you guys some updates in spring.
Update:
Only about 6 hours on the machine but so far I'm kinda blown away.
My first ever zero turn was a Toro Timecutter 42"
Second was a 2007 Gravely 148z.
In my opinion the Scag stripes better, rides smoother, and most noticeable, mulches the clippings to the point of almost completely disappearing.
There is a park area that has not been mowed at all this year, it's around 20" long or more. I made a couple passes to see what the Liberty was capable of. Dispersed the clippings, zero bog, and made a very nice cut/stripe set at 4"
Again, super impressed with the machine within the first 6 hours.
Blurry shot of the 20" cut as it's a screen cap from a vid, but you get the idea.