Hydro Gav does a review of the Pyro on his YouTube channel, he's pretty unbiased as far as I've seen and definitely doesn't hold back on dislikes. I have the 2.5/3.2/4.0 Pyro and my experience lines up with his. Size wise I've found them comparable to the Ozone PR and Frigate in bottom end at 70kg. I've only tried the 4.7m BRM Kanaha and found that closer to the 4.0m Pryo in bottom end, maybe it's a projected vs actual area thing.
At 70kg riding mainly Code 850/980S on a 65L Armie ML these are roughly the 'gust' wind ranges I get. You can keep going in a fair bit less bottom end wise with good technique.
4.0m 15-25 knots
3.2m 19-30 knots
2.5m 23-35 knots
I'm about 35 sessions in on my Pryos and managing the top end definitely gets easier the more you use them over powered. Harness really helps too.
Definitely one to consider out of the current crop of single skin wings.