I have a Panther which is a Platty in different clothing. Brilliant gun, mine is for FT.
Good: its a Mk4, very consistant, superb trigger.
Bad: not keen on the thumb position but getting used to it and with a big Nikko and a Rowan wheel its heavy but that should not be a problem if you are using it for HFT 'cos you won't be using that sort of set up.
Daystate Mk4 iS ST (Huggett shroud & Mod .20) Lightstream 4.5-14x44 FFP
Daystate Grand Panther (Grand Prix stock, .177) Nikko Stirling Diamond 10-50x60
Daystate Panther (Gary Cane custom stock, .177) Sightron SIII 10-50x60