I had a Mk1 in .177.
I liked it but had a good offer so it went a couple of years ago.
I have just bought a later 2010 Harper one in .22
The shot count is huge ,which appeals, and the gun feels light and well balanced.
With just a 3-9 40 AO Hawke it is accurate (in yesterday's wind!)
With 5.52 AA fields it does 11.30 ftlbs -unlike some recent Daystate models?
It goes against my rule of .177 for PCPs but I am a .22 man really.
Just have to work out the long range-70 yard - holdover.
Couldnt be arsed with the wind as well but no problems at 50.
It is a keeper I think.