I also bought one, pretty impressed.
things i have tested and working:
reading data of all the same stuff as AP200
except the espar, forgot that one
coding injectors
ABS bleeding
all wheel speeds(reported under the shifter for some reason)
SRS clear codes
trans clear codes
steering angle pretty good

things I could not do
MAF clear adaptives
Trans clear adaptives things

i didn't check yet
smooth running
compression test

I purchased a Topdon AD800BT almost a year ago when I bought my 2005 140” 3500, and have been very satisfied with it. It has lifetime free updates and can be used on over 100 different makes, it even has a separate Sprinter icon, of vehicles in several countries including AU and EU as well.it’s a touch screen with a Bluetooth dongle. Over the weekend I changed all of my injectors, and was able to code the injectors into the ecu! The live data is amazing and reads almost everything, one of thing I feel it lacks is being able to give live data on all the wheel speeds, I’ve only been able to see 2 of them, I don’t remember which 2.